Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

Thanks for all your efforts. I had assumed that the two heavy cables 
ought to be the fuel pump feed in/out. But it's best to be certain!


I'll do some tests to see if there is any way to diagnose function.

Regards

On 2022-09-27 12:16, Jim Hearne wrote:

It's very strange, i've just been through the wiring diagrams for every 
Ford i can think of up to around 2000 and none have a 3 pin inertia 
switch.
Also, anything into the Mk4 Fiesta, Ka, Focus, Mondeo age uses 
Purple/Orange wires for both sides of the inertia switch.

Using Black/Red for the fuel pump circuit stopped after the Mk3 Fiesta.

Yet, that inertia switch is a post 2000 part number.
Maybe it's from a Mk2 KA but i though they were Fiat based,

That aside, it's going to be the 2 thick wires that are the switch for 
the fuel pump, just ignore the thin wire.


Jim

From: jul...@cityaudioservices.com
Sent: Tuesday, September 27, 2022 11:56 AM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

As I mentioned I found an identical inertia switch to the one fitted 
and ordered it on the basis that the loom must have been modded for it. 
I will of course drop it in and see if it works, but i seriously doubt 
it will because nothing seems to be connected.


So on the assumption that I have to wire it up, does anyone have access 
to details of how the Ka unit should be wired?


Julian

On 2022-09-26 12:59, Jim Hearne wrote:

Alarms normally break 2 circuits, one is usually the starter and the 
other is usually the ignition feed at the ignition switch because it's 
easy to access.
If you are fitting an alarm properly you should break something harder 
to bypass (breaking the ignition circuit can just be bypassed by 
connecting a wire between the battery  + and the ignition coil), the 
supply to the fuel pump would be a suitable circuit.


The Mk3.5 1.6 SI loom is good for upgrading to a 2.0 Zetec as it's 
about the only Fiesta loom that is compatible with the Mondeo ECU 
pinout.


You may have to resort to pulling the dash to see exactly whats going 
on.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:50 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

OK, so the chances are the loom is Mk3. The engine is a 2l Mondeo, the 
lights are the Morette mod and the loom is a shambles, I've found three 
extra fuses in the cabin and several more in the engine bay.


I do also have an alarm - fitted by a prior owner. I was wondering 
about that being the culprit, but it works by not allowing the car to 
be turned over. However finding that both leads to and from the sensor 
are apparently not connected suggests it is not the alarm cutting power 
to the sensor.


That leaves the possibility that the alarm is faulty and is 
interrupting the pump power feed which doesn't go through the sensor.


More investigation required clearly. Or I fit the new impact sensor and 
route an entirely new power feed.


On 2022-09-26 12:36, Jim Hearne wrote:

I was just wondering if somebody has grafted in a Mk4 loom, though why 
you would do that unless you were fitting a Mk4 dash i don't know.


There are various fuses and relays added to the side of the main 
fusebox depending on the options and spec of the car.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:31 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

A thought. I have noticed that the fuse box/relay holder is different 
from the Haynes photo. It does not have the three fuses to the right of 
the relay tray (ie hidden from view unless the tray is unhitched and 
dropped down, it only has the extension on the left. I assumed this was 
merely that Haynes simply showed one model with and ignored the variant 
without.


I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:


The part incidentally is F2AB-9341-AA.


That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector 
and so gained access to the loom wiring I can find no link from the 
fuse (F19) to the connector and no link from the connector to the now 
cut feed wire to the pump (there being a temporary positive feed to the 
pump to keep it going). Both should exist. None of the three wires 
connect to ground or indicate power at any time.


The only explanation I can think of is that the unit was problematic 
and it has been short circuited and it is that connection which has 
failed. My problem of course is I have no idea where that might be. So 
the hunt will go on.


Incidentally the unit is certainly the impact sensor. I managed

Re: [Quantum Owners] H4 electrics - inertia switch

[Jim Hearne]

It’s very strange, i’ve just been through the wiring diagrams for every Ford i 
can think of up to around 2000 and none have a 3 pin inertia switch.
Also, anything into the Mk4 Fiesta, Ka, Focus, Mondeo age uses Purple/Orange 
wires for both sides of the inertia switch.
Using Black/Red for the fuel pump circuit stopped after the Mk3 Fiesta.

Yet, that inertia switch is a post 2000 part number.
Maybe it’s from a Mk2 KA but i though they were Fiat based,

That aside, it’s going to be the 2 thick wires that are the switch for the fuel 
pump, just ignore the thin wire.

Jim


From: jul...@cityaudioservices.com 
Sent: Tuesday, September 27, 2022 11:56 AM
To: quantumowners@googlegroups.com 
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

As I mentioned I found an identical inertia switch to the one fitted and 
ordered it on the basis that the loom must have been modded for it. I will of 
course drop it in and see if it works, but i seriously doubt it will because 
nothing seems to be connected.

So on the assumption that I have to wire it up, does anyone have access to 
details of how the Ka unit should be wired?

Julian

On 2022-09-26 12:59, Jim Hearne wrote:

  Alarms normally break 2 circuits, one is usually the starter and the other is 
usually the ignition feed at the ignition switch because it's easy to access.
  If you are fitting an alarm properly you should break something harder to 
bypass (breaking the ignition circuit can just be bypassed by connecting a wire 
between the battery  + and the ignition coil), the supply to the fuel pump 
would be a suitable circuit.

  The Mk3.5 1.6 SI loom is good for upgrading to a 2.0 Zetec as it's about the 
only Fiesta loom that is compatible with the Mondeo ECU pinout. 

  You may have to resort to pulling the dash to see exactly whats going on.

  Jim


  From: jul...@cityaudioservices.com
  Sent: Monday, September 26, 2022 12:50 PM
  To: quantumowners@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch

  OK, so the chances are the loom is Mk3. The engine is a 2l Mondeo, the lights 
are the Morette mod and the loom is a shambles, I've found three extra fuses in 
the cabin and several more in the engine bay.

  I do also have an alarm - fitted by a prior owner. I was wondering about that 
being the culprit, but it works by not allowing the car to be turned over. 
However finding that both leads to and from the sensor are apparently not 
connected suggests it is not the alarm cutting power to the sensor.

  That leaves the possibility that the alarm is faulty and is interrupting the 
pump power feed which doesn't go through the sensor.

  More investigation required clearly. Or I fit the new impact sensor and route 
an entirely new power feed.





  On 2022-09-26 12:36, Jim Hearne wrote:

I was just wondering if somebody has grafted in a Mk4 loom, though why you 
would do that unless you were fitting a Mk4 dash i don't know.

There are various fuses and relays added to the side of the main fusebox 
depending on the options and spec of the car.

Jim



From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:31 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

A thought. I have noticed that the fuse box/relay holder is different from 
the Haynes photo. It does not have the three fuses to the right of the relay 
tray (ie hidden from view unless the tray is unhitched and dropped down, it 
only has the extension on the left. I assumed this was merely that Haynes 
simply showed one model with and ignored the variant without.

I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:

  >>The part incidentally is F2AB-9341-AA.

  That part number is too new to have come from the donor car.

  Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

  Jim




  From: jul...@cityaudioservices.com
  Sent: Monday, September 26, 2022 12:10 PM
  To: quantumowners@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch

  Hi

  Further investigation is proving tricky. Having removed the connector and 
so gained access to the loom wiring I can find no link from the fuse (F19) to 
the connector and no link from the connector to the now cut feed wire to the 
pump (there being a temporary positive feed to the pump to keep it going). Both 
should exist. None of the three wires connect to ground or indicate power at 
any time.

  The only explanation I can think of is that the unit was problematic and 
it has been short circuited and it is that connection which has failed. My 
problem of course is I have no idea where that might be. So the hunt will go on.

  Incidentally the unit is certainly the impact sensor. I managed to read 
the part number and found one on e-bay and despite it being from a Ka it is 
identical - except mine does not have t

Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

As I mentioned I found an identical inertia switch to the one fitted and 
ordered it on the basis that the loom must have been modded for it. I 
will of course drop it in and see if it works, but i seriously doubt it 
will because nothing seems to be connected.


So on the assumption that I have to wire it up, does anyone have access 
to details of how the Ka unit should be wired?


Julian

On 2022-09-26 12:59, Jim Hearne wrote:

Alarms normally break 2 circuits, one is usually the starter and the 
other is usually the ignition feed at the ignition switch because it's 
easy to access.
If you are fitting an alarm properly you should break something harder 
to bypass (breaking the ignition circuit can just be bypassed by 
connecting a wire between the battery  + and the ignition coil), the 
supply to the fuel pump would be a suitable circuit.


The Mk3.5 1.6 SI loom is good for upgrading to a 2.0 Zetec as it's 
about the only Fiesta loom that is compatible with the Mondeo ECU 
pinout.


You may have to resort to pulling the dash to see exactly whats going 
on.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:50 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

OK, so the chances are the loom is Mk3. The engine is a 2l Mondeo, the 
lights are the Morette mod and the loom is a shambles, I've found three 
extra fuses in the cabin and several more in the engine bay.


I do also have an alarm - fitted by a prior owner. I was wondering 
about that being the culprit, but it works by not allowing the car to 
be turned over. However finding that both leads to and from the sensor 
are apparently not connected suggests it is not the alarm cutting power 
to the sensor.


That leaves the possibility that the alarm is faulty and is 
interrupting the pump power feed which doesn't go through the sensor.


More investigation required clearly. Or I fit the new impact sensor and 
route an entirely new power feed.


On 2022-09-26 12:36, Jim Hearne wrote:

I was just wondering if somebody has grafted in a Mk4 loom, though why 
you would do that unless you were fitting a Mk4 dash i don't know.


There are various fuses and relays added to the side of the main 
fusebox depending on the options and spec of the car.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:31 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

A thought. I have noticed that the fuse box/relay holder is different 
from the Haynes photo. It does not have the three fuses to the right of 
the relay tray (ie hidden from view unless the tray is unhitched and 
dropped down, it only has the extension on the left. I assumed this was 
merely that Haynes simply showed one model with and ignored the variant 
without.


I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:


The part incidentally is F2AB-9341-AA.


That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector 
and so gained access to the loom wiring I can find no link from the 
fuse (F19) to the connector and no link from the connector to the now 
cut feed wire to the pump (there being a temporary positive feed to the 
pump to keep it going). Both should exist. None of the three wires 
connect to ground or indicate power at any time.


The only explanation I can think of is that the unit was problematic 
and it has been short circuited and it is that connection which has 
failed. My problem of course is I have no idea where that might be. So 
the hunt will go on.


Incidentally the unit is certainly the impact sensor. I managed to read 
the part number and found one on e-bay and despite it being from a Ka 
it is identical - except mine does not have the red button, just a hole 
where the red button should be! So perhaps that explains the 
disconnection theory. It broke so it was dispensed with. Anyway, I have 
the e-bay unit on order.


The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help

On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:

Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:
Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire 
into existing loom. Failing that you need to make

Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

I had come to that conclusion :-(

However given that the original shock sensor is not in the feed circuit 
I may just fit the new one and wire it independently. That way I get to 
have a shock sensor again, but one I can find and monitor. Meanwhile I 
can get a a lot of the suspect wiring and work my way through it.


On 2022-09-26 12:59, Jim Hearne wrote:

Alarms normally break 2 circuits, one is usually the starter and the 
other is usually the ignition feed at the ignition switch because it's 
easy to access.
If you are fitting an alarm properly you should break something harder 
to bypass (breaking the ignition circuit can just be bypassed by 
connecting a wire between the battery  + and the ignition coil), the 
supply to the fuel pump would be a suitable circuit.


The Mk3.5 1.6 SI loom is good for upgrading to a 2.0 Zetec as it's 
about the only Fiesta loom that is compatible with the Mondeo ECU 
pinout.


You may have to resort to pulling the dash to see exactly whats going 
on.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:50 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

OK, so the chances are the loom is Mk3. The engine is a 2l Mondeo, the 
lights are the Morette mod and the loom is a shambles, I've found three 
extra fuses in the cabin and several more in the engine bay.


I do also have an alarm - fitted by a prior owner. I was wondering 
about that being the culprit, but it works by not allowing the car to 
be turned over. However finding that both leads to and from the sensor 
are apparently not connected suggests it is not the alarm cutting power 
to the sensor.


That leaves the possibility that the alarm is faulty and is 
interrupting the pump power feed which doesn't go through the sensor.


More investigation required clearly. Or I fit the new impact sensor and 
route an entirely new power feed.


On 2022-09-26 12:36, Jim Hearne wrote:

I was just wondering if somebody has grafted in a Mk4 loom, though why 
you would do that unless you were fitting a Mk4 dash i don't know.


There are various fuses and relays added to the side of the main 
fusebox depending on the options and spec of the car.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:31 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

A thought. I have noticed that the fuse box/relay holder is different 
from the Haynes photo. It does not have the three fuses to the right of 
the relay tray (ie hidden from view unless the tray is unhitched and 
dropped down, it only has the extension on the left. I assumed this was 
merely that Haynes simply showed one model with and ignored the variant 
without.


I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:


The part incidentally is F2AB-9341-AA.


That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector 
and so gained access to the loom wiring I can find no link from the 
fuse (F19) to the connector and no link from the connector to the now 
cut feed wire to the pump (there being a temporary positive feed to the 
pump to keep it going). Both should exist. None of the three wires 
connect to ground or indicate power at any time.


The only explanation I can think of is that the unit was problematic 
and it has been short circuited and it is that connection which has 
failed. My problem of course is I have no idea where that might be. So 
the hunt will go on.


Incidentally the unit is certainly the impact sensor. I managed to read 
the part number and found one on e-bay and despite it being from a Ka 
it is identical - except mine does not have the red button, just a hole 
where the red button should be! So perhaps that explains the 
disconnection theory. It broke so it was dispensed with. Anyway, I have 
the e-bay unit on order.


The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help

On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:

Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:
Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire 
into existing loom. Failing that you need to make connector plug - easy 
enough - most are 3 way AMP connector.
In my setup I

Re: [Quantum Owners] H4 electrics - inertia switch

[Jim Hearne]

Alarms normally break 2 circuits, one is usually the starter and the other is 
usually the ignition feed at the ignition switch because it’s easy to access.
If you are fitting an alarm properly you should break something harder to 
bypass (breaking the ignition circuit can just be bypassed by connecting a wire 
between the battery  + and the ignition coil), the supply to the fuel pump 
would be a suitable circuit.

The Mk3.5 1.6 SI loom is good for upgrading to a 2.0 Zetec as it’s about the 
only Fiesta loom that is compatible with the Mondeo ECU pinout.  

You may have to resort to pulling the dash to see exactly whats going on.

Jim


From: jul...@cityaudioservices.com 
Sent: Monday, September 26, 2022 12:50 PM
To: quantumowners@googlegroups.com 
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

OK, so the chances are the loom is Mk3. The engine is a 2l Mondeo, the lights 
are the Morette mod and the loom is a shambles, I've found three extra fuses in 
the cabin and several more in the engine bay.

I do also have an alarm - fitted by a prior owner. I was wondering about that 
being the culprit, but it works by not allowing the car to be turned over. 
However finding that both leads to and from the sensor are apparently not 
connected suggests it is not the alarm cutting power to the sensor.

That leaves the possibility that the alarm is faulty and is interrupting the 
pump power feed which doesn't go through the sensor. 

More investigation required clearly. Or I fit the new impact sensor and route 
an entirely new power feed.





On 2022-09-26 12:36, Jim Hearne wrote:

  I was just wondering if somebody has grafted in a Mk4 loom, though why you 
would do that unless you were fitting a Mk4 dash i don't know.

  There are various fuses and relays added to the side of the main fusebox 
depending on the options and spec of the car.

  Jim



  From: jul...@cityaudioservices.com
  Sent: Monday, September 26, 2022 12:31 PM
  To: quantumowners@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch

  A thought. I have noticed that the fuse box/relay holder is different from 
the Haynes photo. It does not have the three fuses to the right of the relay 
tray (ie hidden from view unless the tray is unhitched and dropped down, it 
only has the extension on the left. I assumed this was merely that Haynes 
simply showed one model with and ignored the variant without.

  I don't know if that may be relevant.

  On 2022-09-26 12:17, Jim Hearne wrote:

>>The part incidentally is F2AB-9341-AA.

That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim




From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector and 
so gained access to the loom wiring I can find no link from the fuse (F19) to 
the connector and no link from the connector to the now cut feed wire to the 
pump (there being a temporary positive feed to the pump to keep it going). Both 
should exist. None of the three wires connect to ground or indicate power at 
any time.

The only explanation I can think of is that the unit was problematic and it 
has been short circuited and it is that connection which has failed. My problem 
of course is I have no idea where that might be. So the hunt will go on.

Incidentally the unit is certainly the impact sensor. I managed to read the 
part number and found one on e-bay and despite it being from a Ka it is 
identical - except mine does not have the red button, just a hole where the red 
button should be! So perhaps that explains the disconnection theory. It broke 
so it was dispensed with. Anyway, I have the e-bay unit on order.

The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help







On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:



  Thanks for the additional information, very useful.

  On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:

Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.  
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire into 
existing loom. Failing that you need to make connector plug - easy enough - 
most are 3 way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning 
led to show if inertia switch has been triggered (this requires 3rd wire 
connection).

John




On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian

Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

OK, so the chances are the loom is Mk3. The engine is a 2l Mondeo, the 
lights are the Morette mod and the loom is a shambles, I've found three 
extra fuses in the cabin and several more in the engine bay.


I do also have an alarm - fitted by a prior owner. I was wondering about 
that being the culprit, but it works by not allowing the car to be 
turned over. However finding that both leads to and from the sensor are 
apparently not connected suggests it is not the alarm cutting power to 
the sensor.


That leaves the possibility that the alarm is faulty and is interrupting 
the pump power feed which doesn't go through the sensor.


More investigation required clearly. Or I fit the new impact sensor and 
route an entirely new power feed.


On 2022-09-26 12:36, Jim Hearne wrote:

I was just wondering if somebody has grafted in a Mk4 loom, though why 
you would do that unless you were fitting a Mk4 dash i don't know.


There are various fuses and relays added to the side of the main 
fusebox depending on the options and spec of the car.


Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:31 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

A thought. I have noticed that the fuse box/relay holder is different 
from the Haynes photo. It does not have the three fuses to the right of 
the relay tray (ie hidden from view unless the tray is unhitched and 
dropped down, it only has the extension on the left. I assumed this was 
merely that Haynes simply showed one model with and ignored the variant 
without.


I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:


The part incidentally is F2AB-9341-AA.


That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector 
and so gained access to the loom wiring I can find no link from the 
fuse (F19) to the connector and no link from the connector to the now 
cut feed wire to the pump (there being a temporary positive feed to the 
pump to keep it going). Both should exist. None of the three wires 
connect to ground or indicate power at any time.


The only explanation I can think of is that the unit was problematic 
and it has been short circuited and it is that connection which has 
failed. My problem of course is I have no idea where that might be. So 
the hunt will go on.


Incidentally the unit is certainly the impact sensor. I managed to read 
the part number and found one on e-bay and despite it being from a Ka 
it is identical - except mine does not have the red button, just a hole 
where the red button should be! So perhaps that explains the 
disconnection theory. It broke so it was dispensed with. Anyway, I have 
the e-bay unit on order.


The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help

On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:

Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:
Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire 
into existing loom. Failing that you need to make connector plug - easy 
enough - most are 3 way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning 
led to show if inertia switch has been triggered (this requires 3rd 
wire connection).


John

On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:

Hi

I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's the 
right sort of size but has three connections where the manual says two, 
although one appears at least to be the right colour code. Also it has 
no reset button. However what it does have at the top is a cylinder 
which might once have been the housing for a plunger.


I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, I 
will attempt to remove it and see if it can be reset.


Alternatively do you know if a replacement might be obtained?

Julian

On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.


Jim

From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4

Re: [Quantum Owners] H4 electrics - inertia switch

[Jim Hearne]

I was just wondering if somebody has grafted in a Mk4 loom, though why you 
would do that unless you were fitting a Mk4 dash i don’t know.

There are various fuses and relays added to the side of the main fusebox 
depending on the options and spec of the car.

Jim



From: jul...@cityaudioservices.com 
Sent: Monday, September 26, 2022 12:31 PM
To: quantumowners@googlegroups.com 
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

A thought. I have noticed that the fuse box/relay holder is different from the 
Haynes photo. It does not have the three fuses to the right of the relay tray 
(ie hidden from view unless the tray is unhitched and dropped down, it only has 
the extension on the left. I assumed this was merely that Haynes simply showed 
one model with and ignored the variant without.

I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:

  >>The part incidentally is F2AB-9341-AA.

  That part number is too new to have come from the donor car.

  Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

  Jim




  From: jul...@cityaudioservices.com
  Sent: Monday, September 26, 2022 12:10 PM
  To: quantumowners@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch

  Hi

  Further investigation is proving tricky. Having removed the connector and so 
gained access to the loom wiring I can find no link from the fuse (F19) to the 
connector and no link from the connector to the now cut feed wire to the pump 
(there being a temporary positive feed to the pump to keep it going). Both 
should exist. None of the three wires connect to ground or indicate power at 
any time.

  The only explanation I can think of is that the unit was problematic and it 
has been short circuited and it is that connection which has failed. My problem 
of course is I have no idea where that might be. So the hunt will go on.

  Incidentally the unit is certainly the impact sensor. I managed to read the 
part number and found one on e-bay and despite it being from a Ka it is 
identical - except mine does not have the red button, just a hole where the red 
button should be! So perhaps that explains the disconnection theory. It broke 
so it was dispensed with. Anyway, I have the e-bay unit on order.

  The part incidentally is F2AB-9341-AA.

  Now I just have to find the bodge.

  Regards and thanks for all the help







  On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:



Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:

  Inertia switches are readily available from breakers, Ebay etc. Most are 
3 pin but often connector only uses 2 of the pins.  
  The one I fitted in my saloon came from a Ford Fusion, Fiesta or similar 
(the type with yellow top).
  If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire into 
existing loom. Failing that you need to make connector plug - easy enough - 
most are 3 way AMP connector.
  In my setup I also installed a bypass switch and a dashboard warning led 
to show if inertia switch has been triggered (this requires 3rd wire 
connection). 

  John




  On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:
Hi

I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's the right 
sort of size but has three connections where the manual says two, although one 
appears at least to be the right colour code. Also it has no reset button. 
However what it does have at the top is a cylinder which might once have been 
the housing for a plunger.

I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, I will 
attempt to remove it and see if it can be reset.

Alternatively do you know if a replacement might be obtained?

Julian




On 2022-09-23 14:33, Jim Hearne wrote:

  It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.

  Jim


  From: jul...@cityaudioservices.com
  Sent: Friday, September 23, 2022 2:30 PM
  To: quantu...@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch

  All

  I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.

  Fingers crossed I can find it.

  Thanks as ever for the help



  On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a 
Mondeo (company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start – you can imagine he was pretty exasperated. It turned 
out the inertia switch was in the boot near where he dropped the punctured 
tyre

Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

A thought. I have noticed that the fuse box/relay holder is different 
from the Haynes photo. It does not have the three fuses to the right of 
the relay tray (ie hidden from view unless the tray is unhitched and 
dropped down, it only has the extension on the left. I assumed this was 
merely that Haynes simply showed one model with and ignored the variant 
without.


I don't know if that may be relevant.

On 2022-09-26 12:17, Jim Hearne wrote:


The part incidentally is F2AB-9341-AA.


That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim

From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector 
and so gained access to the loom wiring I can find no link from the 
fuse (F19) to the connector and no link from the connector to the now 
cut feed wire to the pump (there being a temporary positive feed to the 
pump to keep it going). Both should exist. None of the three wires 
connect to ground or indicate power at any time.


The only explanation I can think of is that the unit was problematic 
and it has been short circuited and it is that connection which has 
failed. My problem of course is I have no idea where that might be. So 
the hunt will go on.


Incidentally the unit is certainly the impact sensor. I managed to read 
the part number and found one on e-bay and despite it being from a Ka 
it is identical - except mine does not have the red button, just a hole 
where the red button should be! So perhaps that explains the 
disconnection theory. It broke so it was dispensed with. Anyway, I have 
the e-bay unit on order.


The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help

On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:

Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:
Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire 
into existing loom. Failing that you need to make connector plug - easy 
enough - most are 3 way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning 
led to show if inertia switch has been triggered (this requires 3rd 
wire connection).


John

On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:

Hi

I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's the 
right sort of size but has three connections where the manual says two, 
although one appears at least to be the right colour code. Also it has 
no reset button. However what it does have at the top is a cylinder 
which might once have been the housing for a plunger.


I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, I 
will attempt to remove it and see if it can be reset.


Alternatively do you know if a replacement might be obtained?

Julian

On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.


Jim

From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.


Fingers crossed I can find it.

Thanks as ever for the help

On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start - you can imagine he was pretty exasperated. It 
turned out the inertia switch was in the boot near where he dropped the 
punctured tyre/wheel!


Martin Scott

Sent from Mail [2] for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! Looking 
at the circuit diagram there are several potential

Re: [Quantum Owners] H4 electrics - inertia switch

[Jim Hearne]

>>The part incidentally is F2AB-9341-AA.

That part number is too new to have come from the donor car.

Has this car got a Mk4 or Mk5 Fiesta dash fitted ?

Jim




From: jul...@cityaudioservices.com 
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com 
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Hi

Further investigation is proving tricky. Having removed the connector and so 
gained access to the loom wiring I can find no link from the fuse (F19) to the 
connector and no link from the connector to the now cut feed wire to the pump 
(there being a temporary positive feed to the pump to keep it going). Both 
should exist. None of the three wires connect to ground or indicate power at 
any time.

The only explanation I can think of is that the unit was problematic and it has 
been short circuited and it is that connection which has failed. My problem of 
course is I have no idea where that might be. So the hunt will go on.

Incidentally the unit is certainly the impact sensor. I managed to read the 
part number and found one on e-bay and despite it being from a Ka it is 
identical - except mine does not have the red button, just a hole where the red 
button should be! So perhaps that explains the disconnection theory. It broke 
so it was dispensed with. Anyway, I have the e-bay unit on order. 

The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help







On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:



  Thanks for the additional information, very useful.

  On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:

Inertia switches are readily available from breakers, Ebay etc. Most are 3 
pin but often connector only uses 2 of the pins.  
The one I fitted in my saloon came from a Ford Fusion, Fiesta or similar 
(the type with yellow top).
If you get one from breakers best to get complete with male connector plug 
and short section of wiring harness - this make it easy to wire into existing 
loom. Failing that you need to make connector plug - easy enough - most are 3 
way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning led to 
show if inertia switch has been triggered (this requires 3rd wire connection).  

John




On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:
  Hi

  I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's the right 
sort of size but has three connections where the manual says two, although one 
appears at least to be the right colour code. Also it has no reset button. 
However what it does have at the top is a cylinder which might once have been 
the housing for a plunger.

  I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, I will 
attempt to remove it and see if it can be reset. 

  Alternatively do you know if a replacement might be obtained? 

  Julian




  On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.

Jim


From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.

Fingers crossed I can find it.

Thanks as ever for the help



On 2022-09-23 14:09, susanandmartin wrote:

  As Steve said, near the door (A) pillar is a common place. In a 
Mondeo (company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start – you can imagine he was pretty exasperated. It turned 
out the inertia switch was in the boot near where he dropped the punctured 
tyre/wheel!

  Martin Scott 



  Sent from Mail for Windows 10



  From: 'Steve Kodź' via Quantum Owners Group
  Sent: 23 September 2022 13:41
  To: quantu...@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch



  Julian,

  Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was attached to 
the chassis door pillar in the passenger foot well.

  Regards,
  Steve

  On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven 
into the brake test equipment which involved the car being grounded! Looking at 
the circuit diagram there are several potential reasons why this happened, most 
of which I know how to diagnose and where to look. But one possible potential 
problem is the 

Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

Hi

Further investigation is proving tricky. Having removed the connector 
and so gained access to the loom wiring I can find no link from the fuse 
(F19) to the connector and no link from the connector to the now cut 
feed wire to the pump (there being a temporary positive feed to the pump 
to keep it going). Both should exist. None of the three wires connect to 
ground or indicate power at any time.


The only explanation I can think of is that the unit was problematic and 
it has been short circuited and it is that connection which has failed. 
My problem of course is I have no idea where that might be. So the hunt 
will go on.


Incidentally the unit is certainly the impact sensor. I managed to read 
the part number and found one on e-bay and despite it being from a Ka it 
is identical - except mine does not have the red button, just a hole 
where the red button should be! So perhaps that explains the 
disconnection theory. It broke so it was dispensed with. Anyway, I have 
the e-bay unit on order.


The part incidentally is F2AB-9341-AA.

Now I just have to find the bodge.

Regards and thanks for all the help

On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:


Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:
Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire 
into existing loom. Failing that you need to make connector plug - easy 
enough - most are 3 way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning 
led to show if inertia switch has been triggered (this requires 3rd 
wire connection).


John

On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:

Hi

I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's the 
right sort of size but has three connections where the manual says two, 
although one appears at least to be the right colour code. Also it has 
no reset button. However what it does have at the top is a cylinder 
which might once have been the housing for a plunger.


I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, I 
will attempt to remove it and see if it can be reset.


Alternatively do you know if a replacement might be obtained?

Julian

On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.


Jim

From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.


Fingers crossed I can find it.

Thanks as ever for the help

On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start - you can imagine he was pretty exasperated. It 
turned out the inertia switch was in the boot near where he dropped the 
punctured tyre/wheel!


Martin Scott

Sent from Mail [2] for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! Looking 
at the circuit diagram there are several potential reasons why this 
happened, most of which I know how to diagnose and where to look. But 
one possible potential problem is the impact sensor which is shown in 
the Haynes manual.


Does anyone know if these are usually refitted in an H4 and if so is 
there a 'standard' location? It might help me locate it without having 
to dismantle the entire vehicle. If anyone has a photo of the actual 
unit I'm looking for, that would also help.


Thanks

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Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

Thanks for the additional information, very useful.

On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:

Inertia switches are readily available from breakers, Ebay etc. Most 
are 3 pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or 
similar (the type with yellow top).
If you get one from breakers best to get complete with male connector 
plug and short section of wiring harness - this make it easy to wire 
into existing loom. Failing that you need to make connector plug - easy 
enough - most are 3 way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning 
led to show if inertia switch has been triggered (this requires 3rd 
wire connection).


John

On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:

Hi

I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's the 
right sort of size but has three connections where the manual says two, 
although one appears at least to be the right colour code. Also it has 
no reset button. However what it does have at the top is a cylinder 
which might once have been the housing for a plunger.


I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, I 
will attempt to remove it and see if it can be reset.


Alternatively do you know if a replacement might be obtained?

Julian

On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.


Jim

From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.


Fingers crossed I can find it.

Thanks as ever for the help

On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start - you can imagine he was pretty exasperated. It 
turned out the inertia switch was in the boot near where he dropped the 
punctured tyre/wheel!


Martin Scott

Sent from Mail [2] for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! Looking 
at the circuit diagram there are several potential reasons why this 
happened, most of which I know how to diagnose and where to look. But 
one possible potential problem is the impact sensor which is shown in 
the Haynes manual.


Does anyone know if these are usually refitted in an H4 and if so is 
there a 'standard' location? It might help me locate it without having 
to dismantle the entire vehicle. If anyone has a photo of the actual 
unit I'm looking for, that would also help.


Thanks

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IMPORTANT NOTE: All information presented herewith is provided on an 
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Quantum Owners Club nor the individuals associated with the Quantum 
Owners Club or in the preparation of the above information shall have 
any liability to any person or entity with respect to liability, loss, 
or damage caused or alleged to be caused directly or indirectly by the 
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q

Re: [Quantum Owners] H4 electrics - inertia switch

[list...@liberator-systems.co.uk]

Inertia switches are readily available from breakers, Ebay etc. Most are 3 
pin but often connector only uses 2 of the pins. 
The one I fitted in my saloon came from a Ford Fusion, Fiesta or similar 
(the type with yellow top).
If you get one from breakers best to get complete with male connector plug 
and short section of wiring harness - this make it easy to wire into 
existing loom. Failing that you need to make connector plug - easy enough - 
most are 3 way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning led to 
show if inertia switch has been triggered (this requires 3rd wire 
connection).  

John



On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:

> Hi
>
> I have found an air bag sensor (though there are none in the car of 
> course) and close by another potential suspect - see attached. It's the 
> right sort of size but has three connections where the manual says two, 
> although one appears at least to be the right colour code. Also it has no 
> reset button. However what it does have at the top is a cylinder which 
> might once have been the housing for a plunger.
>
> I haven't yet tried testing anything like circuit tracing because the 
> plastic of the connector look easy to break. If it is the right unit, I 
> will attempt to remove it and see if it can be reset. 
>
> Alternatively do you know if a replacement might be obtained? 
>
> Julian
>
>
> On 2022-09-23 14:33, Jim Hearne wrote:
>
> It's bigger than you might think, maybe 50 x 40 x 30 with the red button 
> on the top.
>  
> Jim
>  
>  
> *From:* jul...@cityaudioservices.com
> *Sent:* Friday, September 23, 2022 2:30 PM
> *To:* quantu...@googlegroups.com
> *Subject:* Re: [Quantum Owners] H4 electrics - inertia switch
>  
>
> All
>
> I'm assuming from what I can see on the web it's likely to be a small 
> flattish black box.
>
> Fingers crossed I can find it.
>
> Thanks as ever for the help
>
>
> On 2022-09-23 14:09, susanandmartin wrote:
>
> As Steve said, near the door (A) pillar is a common place. In a Mondeo 
> (company car) a work colleague had a flat tyre and changed it, then the 
> vehicle wouldn't start – you can imagine he was pretty exasperated. It 
> turned out the inertia switch was in the boot near where he dropped the 
> punctured tyre/wheel!
>
> Martin Scott 
>
>  
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
> Windows 10
>
>  
>
> *From: *'Steve Kodź' via Quantum Owners Group
> *Sent: *23 September 2022 13:41
> *To: *quantu...@googlegroups.com
> *Subject: *Re: [Quantum Owners] H4 electrics - inertia switch
>
>  
>
> Julian,
>
> Not sure about a standard location, but I think the wiring would naturally 
> position this in the passenger foot well area. Mine was attached to the 
> chassis door pillar in the passenger foot well.
>
> Regards,
> Steve
>
> On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:
>
> Hi
>
> My H4 cut out unexpectedly at the MoT garage after being driven into the 
> brake test equipment which involved the car being grounded! Looking at the 
> circuit diagram there are several potential reasons why this happened, most 
> of which I know how to diagnose and where to look. But one possible 
> potential problem is the impact sensor which is shown in the Haynes manual.
>
> Does anyone know if these are usually refitted in an H4 and if so is there 
> a 'standard' location? It might help me locate it without having to 
> dismantle the entire vehicle. If anyone has a photo of the actual unit I'm 
> looking for, that would also help.
>
> Thanks
>
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Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

Thanks for confirmation. Unfortunately there is no button unless it is 
deep inside the tube at the top. I can't feel anything in there. I'll 
probably have to extract the thing and see if I find something to push 
on.


On 2022-09-25 19:17, Pete M wrote:


That's the switch - to reset it you just press the button on the top

On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:


Hi

I have found an air bag sensor (though there are none in the car of 
course) and close by another potential suspect - see attached. It's 
the right sort of size but has three connections where the manual says 
two, although one appears at least to be the right colour code. Also 
it has no reset button. However what it does have at the top is a 
cylinder which might once have been the housing for a plunger.


I haven't yet tried testing anything like circuit tracing because the 
plastic of the connector look easy to break. If it is the right unit, 
I will attempt to remove it and see if it can be reset.


Alternatively do you know if a replacement might be obtained?

Julian


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Re: [Quantum Owners] H4 electrics - inertia switch

[Pete M]

That's the switch - to reset it you just press the button on the top


On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:

> Hi
>
> I have found an air bag sensor (though there are none in the car of 
> course) and close by another potential suspect - see attached. It's the 
> right sort of size but has three connections where the manual says two, 
> although one appears at least to be the right colour code. Also it has no 
> reset button. However what it does have at the top is a cylinder which 
> might once have been the housing for a plunger.
>
> I haven't yet tried testing anything like circuit tracing because the 
> plastic of the connector look easy to break. If it is the right unit, I 
> will attempt to remove it and see if it can be reset. 
>
> Alternatively do you know if a replacement might be obtained? 
>
> Julian
>
>

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Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

An update:

I'm now pretty sure it is the impact/inertia sensor. Power goes to and 
through the fuse but doesn't get to the pump. Whilst it could be a cable 
fault, it's unlikely. However I cannot find the damn thing!  To get it 
running I have provided a separate feed. Next step is to get the car in 
the air to check it's not near the tank. Then I guess it will be off 
with the dash! The wiring under there is shocking  - every time I look I 
find another in line fuse just hanging around - so I do want to do that 
as soon as I can. But there is an endless (if shortening) list of things 
to do - as always.


Regards

On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.


Jim

From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.


Fingers crossed I can find it.

Thanks as ever for the help

On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start - you can imagine he was pretty exasperated. It 
turned out the inertia switch was in the boot near where he dropped the 
punctured tyre/wheel!


Martin Scott

Sent from Mail [1] for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! Looking 
at the circuit diagram there are several potential reasons why this 
happened, most of which I know how to diagnose and where to look. But 
one possible potential problem is the impact sensor which is shown in 
the Haynes manual.


Does anyone know if these are usually refitted in an H4 and if so is 
there a 'standard' location? It might help me locate it without having 
to dismantle the entire vehicle. If anyone has a photo of the actual 
unit I'm looking for, that would also help.


Thanks

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Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

That's useful - I was expecting it to be smaller than that. At least 
slimmer!


On 2022-09-23 14:33, Jim Hearne wrote:

It's bigger than you might think, maybe 50 x 40 x 30 with the red 
button on the top.


Jim

From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.


Fingers crossed I can find it.

Thanks as ever for the help

On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start - you can imagine he was pretty exasperated. It 
turned out the inertia switch was in the boot near where he dropped the 
punctured tyre/wheel!


Martin Scott

Sent from Mail [1] for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! Looking 
at the circuit diagram there are several potential reasons why this 
happened, most of which I know how to diagnose and where to look. But 
one possible potential problem is the impact sensor which is shown in 
the Haynes manual.


Does anyone know if these are usually refitted in an H4 and if so is 
there a 'standard' location? It might help me locate it without having 
to dismantle the entire vehicle. If anyone has a photo of the actual 
unit I'm looking for, that would also help.


Thanks

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Re: [Quantum Owners] H4 electrics - inertia switch

[Jim Hearne]

It’s bigger than you might think, maybe 50 x 40 x 30 with the red button on the 
top.

Jim


From: jul...@cityaudioservices.com 
Sent: Friday, September 23, 2022 2:30 PM
To: quantumowners@googlegroups.com 
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

All

I'm assuming from what I can see on the web it's likely to be a small flattish 
black box. 

Fingers crossed I can find it.

Thanks as ever for the help



On 2022-09-23 14:09, susanandmartin wrote:

  As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the vehicle 
wouldn't start – you can imagine he was pretty exasperated. It turned out the 
inertia switch was in the boot near where he dropped the punctured tyre/wheel!

  Martin Scott 



  Sent from Mail for Windows 10



  From: 'Steve Kodź' via Quantum Owners Group
  Sent: 23 September 2022 13:41
  To: quantumowners@googlegroups.com
  Subject: Re: [Quantum Owners] H4 electrics - inertia switch



  Julian,

  Not sure about a standard location, but I think the wiring would naturally 
position this in the passenger foot well area. Mine was attached to the chassis 
door pillar in the passenger foot well.

  Regards,
  Steve

  On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

Hi

My H4 cut out unexpectedly at the MoT garage after being driven into the 
brake test equipment which involved the car being grounded! Looking at the 
circuit diagram there are several potential reasons why this happened, most of 
which I know how to diagnose and where to look. But one possible potential 
problem is the impact sensor which is shown in the Haynes manual.

Does anyone know if these are usually refitted in an H4 and if so is there 
a 'standard' location? It might help me locate it without having to dismantle 
the entire vehicle. If anyone has a photo of the actual unit I'm looking for, 
that would also help.

Thanks

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or entity with respect to liability, loss, or damage caused or alleged to be 
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Re: [Quantum Owners] H4 electrics - inertia switch

[julian]

All

I'm assuming from what I can see on the web it's likely to be a small 
flattish black box.


Fingers crossed I can find it.

Thanks as ever for the help

On 2022-09-23 14:09, susanandmartin wrote:

As Steve said, near the door (A) pillar is a common place. In a Mondeo 
(company car) a work colleague had a flat tyre and changed it, then the 
vehicle wouldn't start - you can imagine he was pretty exasperated. It 
turned out the inertia switch was in the boot near where he dropped the 
punctured tyre/wheel!


Martin Scott

Sent from Mail [2] for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:


Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! 
Looking at the circuit diagram there are several potential reasons why 
this happened, most of which I know how to diagnose and where to look. 
But one possible potential problem is the impact sensor which is shown 
in the Haynes manual.


Does anyone know if these are usually refitted in an H4 and if so is 
there a 'standard' location? It might help me locate it without having 
to dismantle the entire vehicle. If anyone has a photo of the actual 
unit I'm looking for, that would also help.


Thanks

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Quantum Owners Club or in the preparation of the above information 
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or damage caus

RE: [Quantum Owners] H4 electrics - inertia switch

[susanandmartin]

As Steve said, near the door (A) pillar is a common place. In a Mondeo (company 
car) a work colleague had a flat tyre and changed it, then the vehicle wouldn’t 
start – you can imagine he was pretty exasperated. It turned out the inertia 
switch was in the boot near where he dropped the punctured tyre/wheel!
Martin Scott 

Sent from Mail for Windows 10

From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,
Not sure about a standard location, but I think the wiring would naturally 
position this in the passenger foot well area. Mine was attached to the chassis 
door pillar in the passenger foot well.
Regards,
Steve
On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:
Hi
My H4 cut out unexpectedly at the MoT garage after being driven into the brake 
test equipment which involved the car being grounded! Looking at the circuit 
diagram there are several potential reasons why this happened, most of which I 
know how to diagnose and where to look. But one possible potential problem is 
the impact sensor which is shown in the Haynes manual.
Does anyone know if these are usually refitted in an H4 and if so is there a 
'standard' location? It might help me locate it without having to dismantle the 
entire vehicle. If anyone has a photo of the actual unit I'm looking for, that 
would also help.
Thanks
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Re: [Quantum Owners] H4 electrics - inertia switch

[Jim Hearne]

That is the location on the donor car, the passenger footwell just next to the 
door pillar.

Can’t see how or why a car would be grounded on the brake test though.
More likely they bumped it into the rollers a bit hard and it tripped the 
cutout, especially if it was less firmly mounted than on the donor car.

Jim


From: 'Steve Kodź' via Quantum Owners Group 
Sent: Friday, September 23, 2022 1:41 PM
To: quantumowners@googlegroups.com 
Subject: Re: [Quantum Owners] H4 electrics - inertia switch

Julian,

Not sure about a standard location, but I think the wiring would naturally 
position this in the passenger foot well area. Mine was attached to the chassis 
door pillar in the passenger foot well.

Regards,
Steve


On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:

  Hi

  My H4 cut out unexpectedly at the MoT garage after being driven into the 
brake test equipment which involved the car being grounded! Looking at the 
circuit diagram there are several potential reasons why this happened, most of 
which I know how to diagnose and where to look. But one possible potential 
problem is the impact sensor which is shown in the Haynes manual.

  Does anyone know if these are usually refitted in an H4 and if so is there a 
'standard' location? It might help me locate it without having to dismantle the 
entire vehicle. If anyone has a photo of the actual unit I'm looking for, that 
would also help.

  Thanks

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Re: [Quantum Owners] H4 electrics - inertia switch

['Steve Kodź' via Quantum Owners Group]

Julian,

Not sure about a standard location, but I think the wiring would 
naturally position this in the passenger foot well area. Mine was 
attached to the chassis door pillar in the passenger foot well.


Regards,
Steve

On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:


Hi

My H4 cut out unexpectedly at the MoT garage after being driven into 
the brake test equipment which involved the car being grounded! 
Looking at the circuit diagram there are several potential reasons why 
this happened, most of which I know how to diagnose and where to look. 
But one possible potential problem is the impact sensor which is shown 
in the Haynes manual.


Does anyone know if these are usually refitted in an H4 and if so is 
there a 'standard' location? It might help me locate it without having 
to dismantle the entire vehicle. If anyone has a photo of the actual 
unit I'm looking for, that would also help.


Thanks

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IMPORTANT NOTE: All information presented herewith is provided on an 
"As Is" basis, without warranty or the implication thereof. Neither 
the Quantum Owners Club nor the individuals associated with the 
Quantum Owners Club or in the preparation of the above information 
shall have any liability to any person or entity with respect to 
liability, loss, or damage caused or alleged to be caused directly or 
indirectly by the instructions contained within this or related 
message(s).

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