Re: [MBZ] Blown fuse

2015-07-30 Thread Curly McLain via Mercedes
AC compressor was blowing fuse #7 in my '87 300D.  Indie MB tech at 
D  E Services in Raleigh R  R compressor and aux fan resistor; 
BLOWING ICE COLD again.


Wilton


Waytago!

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Re: [MBZ] Blown fuse

2015-07-18 Thread Max Dillon via Mercedes
This is for OM603, which I believe is a Nippondenso compressor from the factory.
-- 
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 17, 2015 11:42:25 PM EDT, Curly McLain via Mercedes 
mercedes@okiebenz.com wrote:
This is for the Japanee compressor?  I assume not for the GM in the
123s?



Here's the troubleshooting info for the clutch coil, either read ohms
or
amps depending on your test equipment.  This was copied from the MBCA
forums before they effectively killed it.  I met Bob Goodwin a few
times,
retired Navy and a great guy.

There is one thing that I don't believe is covered as well as it
should be
and that is the clutch coil. Yes, the clutch coil. Famous for burning
out,
shorting out or just frying a few windings. Not enough to blow the
fuse but
plenty to disrupt the speed comparator and shut off the compressor
permanently or intermittently.


Of all the troubleshooting steps, checking the compressor clutch coil
is
cheap and relatively easy. Measure current with a clamp on amp meter.
Reading should be 3.75 A hot or 4.2 A cold. Resistance should be
approx 3.5
ohms hot or 3.1 ohms cold.

Everytime I chased an elusive A/C compressor problem in a Mercedes, it
turned out to be a bad clutch. I don't spend near as much on A/C parts
anymore.

__
Robert Goodwin

Virginia Beach, Virginia
'87 300SDL
'95 E300D




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Re: [MBZ] Blown fuse

2015-07-18 Thread Curly McLain via Mercedes

Thanks.  That is how I marked it in my file.  but I wanted to check.

This is for OM603, which I believe is a Nippondenso compressor from 
the factory.

--
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 17, 2015 11:42:25 PM EDT, Curly McLain via Mercedes 
mercedes@okiebenz.com wrote:

This is for the Japanee compressor?  I assume not for the GM in the
123s?




Here's the troubleshooting info for the clutch coil, either read ohms

or

amps depending on your test equipment.  This was copied from the MBCA
forums before they effectively killed it.  I met Bob Goodwin a few

times,

retired Navy and a great guy.

There is one thing that I don't believe is covered as well as it

should be

and that is the clutch coil. Yes, the clutch coil. Famous for burning

out,

shorting out or just frying a few windings. Not enough to blow the

fuse but

plenty to disrupt the speed comparator and shut off the compressor
permanently or intermittently.


Of all the troubleshooting steps, checking the compressor clutch coil

is

cheap and relatively easy. Measure current with a clamp on amp meter.
Reading should be 3.75 A hot or 4.2 A cold. Resistance should be

approx 3.5

ohms hot or 3.1 ohms cold.

Everytime I chased an elusive A/C compressor problem in a Mercedes, it
turned out to be a bad clutch. I don't spend near as much on A/C parts
anymore.

__

 Robert Goodwin
 


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Re: [MBZ] Blown fuse

2015-07-18 Thread WILTON via Mercedes
Thanks for the reminder.  In 36 years of driving MB's, I've never used 
econ. mode and had forgotten it.


Meanwhile, yesterday afternoon, I unplugged switch at dryer (easy for me to 
reach), which kept compressor from operating.  'Ran control unit on HIGH fan 
speed for 10 min. or so with fuse holding, then plugged in wires at the 
dryer to allow compressor to run.  Compressor seemed a bit noisy and ran 
three or four minutes BLOWING ICE COLD until fuse blew.  I'll take it to my 
A/C guy 5 or 6 blocks away Monday to see what he can find.


BTW, not only can I not see the connection at the compressor, I can't reach 
it - couple more of those things I used to do so easily.


Wilton

- Original Message - 
From: Peter Frederick via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Peter Frederick psf...@earthlink.net
Sent: Friday, July 17, 2015 6:25 PM
Subject: Re: [MBZ] Blown fuse


Use the economy mode on the climate control.  Works just like it  does 
in normal mode.


Or you can unplug the connection for the clutch at the compressor.

Peter

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Re: [MBZ] Blown fuse

2015-07-17 Thread WILTON via Mercedes

Fan turns freely.

SWMBO took car out late yesterday with A/C OFF; everything else as usual. 
Returned with fuse intact.


What is best way to isolate compressor from the system with controls calling 
for cooling as usual?  Unplug wire on pressure switch at dryer?


What is the likelihood of a glitche in the control unit causing the fuse 
to blow?


Same for temp. sensor motor?

Wilton

- Original Message - 
From: Curly McLain via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Curly McLain 126die...@gmail.com
Sent: Thursday, July 16, 2015 11:32 PM
Subject: Re: [MBZ] Blown fuse


I'd check the engine fan to be sure it turns freely.  I think it is one of 
the highest energy consumers in that list



I removed the fuse placard and carefully cleaned away the soot and 
scorching as best I can.  I have deciphered the fuse #7 list to read: 
backup lamp, heating water valve, water pump, engine fan, heating system 
for washer jets, climate control system, relay aux fan term. 86, auto. 
trans. electrics, blower motor inside temp. sensor, air cond. compressor. 
(I filled in several obscured words with imagination and/or what I vaguely 
remember.  Can somebody please verify it for me?)


Wilton

- Original Message - From: WILTON via Mercedes 
mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Thursday, July 16, 2015 1:39 PM
Subject: Re: [MBZ] Blown fuse


#7 fuse has blown couple more times.  The placard inside the fuse box 
cover is scorched, obscuring the list of systems in addition to 
compressor on that fuse, and I can't open the pdf file showing such as I 
have many times before.  Can somebody, please, send me a photo of the 
placard or the appropriate pdf showing those items on fuse #7 for '87 
300D?


Wilton

- Original Message - From: WILTON via Mercedes 
mercedes@okiebenz.com

To: mercedes list mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Tuesday, July 14, 2015 4:51 PM
Subject: [MBZ] Blown fuse

SWMBO came in from short trip in the '87 300D, leaned over back of chair 
in cool living room where I was napping and announced, Blown fuse in 
the car.  I was driving along with air conditioning blasting away 
nicely, and it just quit.  Don't ya think it's a blown fuse?


I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting screws 
thinking the fuse would fall apart as I removed it, but it did not. 
Checked fuses in fuse box; 'found #7 (for compressor and coupla other 
things) blown.  Because of my shaky hands, called SWMBO to help me put 
blower fuse back in place and RR #7.  A/C blowing ice cold again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton


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Re: [MBZ] Blown fuse

2015-07-17 Thread Max Dillon via Mercedes
Wilton,

I know that pulling the KLIMA relay will disable the AC compressor, that is 
located right behind the battery and fairly easy to get to, but may be pretty 
tight in the socket.  A firm grip and gentle working while pulling up should 
free it.  I don't know if a failing push-button unit would still blow the fuse 
if the KLIMA relay were removed.

Pulling the plug on the top of the compressor would definitely isolate it, but 
that would also remove the compressor speed signal, which means the KLIMA relay 
would interrupt the power to the compressor clutch.

A common cause of trouble in the AC compressor controls is a failing clutch 
that draws too much current.  I'll have to search for a bit to find the normal 
amperage.  I'd measure that current next if I were you, or is the test a 
resistance test?  Need to start digging...
-- 
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes mercedes@okiebenz.com 
wrote:
Fan turns freely.

SWMBO took car out late yesterday with A/C OFF; everything else as
usual. 
Returned with fuse intact.

What is best way to isolate compressor from the system with controls
calling 
for cooling as usual?  Unplug wire on pressure switch at dryer?

What is the likelihood of a glitche in the control unit causing the
fuse 
to blow?

Same for temp. sensor motor?

Wilton

- Original Message - 
From: Curly McLain via Mercedes mercedes@okiebenz.com
To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Curly McLain 126die...@gmail.com
Sent: Thursday, July 16, 2015 11:32 PM
Subject: Re: [MBZ] Blown fuse


 I'd check the engine fan to be sure it turns freely.  I think it is
one of 
 the highest energy consumers in that list


I removed the fuse placard and carefully cleaned away the soot and 
scorching as best I can.  I have deciphered the fuse #7 list to read:

backup lamp, heating water valve, water pump, engine fan, heating
system 
for washer jets, climate control system, relay aux fan term. 86,
auto. 
trans. electrics, blower motor inside temp. sensor, air cond.
compressor. 
(I filled in several obscured words with imagination and/or what I
vaguely 
remember.  Can somebody please verify it for me?)

Wilton

- Original Message - From: WILTON via Mercedes 
mercedes@okiebenz.com
To: Mercedes Discussion List mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Thursday, July 16, 2015 1:39 PM
Subject: Re: [MBZ] Blown fuse


#7 fuse has blown couple more times.  The placard inside the fuse
box 
cover is scorched, obscuring the list of systems in addition to 
compressor on that fuse, and I can't open the pdf file showing such
as I 
have many times before.  Can somebody, please, send me a photo of
the 
placard or the appropriate pdf showing those items on fuse #7 for
'87 
300D?

Wilton

- Original Message - From: WILTON via Mercedes 
mercedes@okiebenz.com
To: mercedes list mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Tuesday, July 14, 2015 4:51 PM
Subject: [MBZ] Blown fuse

SWMBO came in from short trip in the '87 300D, leaned over back of
chair 
in cool living room where I was napping and announced, Blown fuse
in 
the car.  I was driving along with air conditioning blasting away 
nicely, and it just quit.  Don't ya think it's a blown fuse?

I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting
screws 
thinking the fuse would fall apart as I removed it, but it did not.

Checked fuses in fuse box; 'found #7 (for compressor and coupla
other 
things) blown.  Because of my shaky hands, called SWMBO to help me
put 
blower fuse back in place and RR #7.  A/C blowing ice cold again.

BTW, I did NOT change ALL the fuses.  ;)

Wilton

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Re: [MBZ] Blown fuse

2015-07-17 Thread Meade Dillon via Mercedes
Here's the troubleshooting info for the clutch coil, either read ohms or
amps depending on your test equipment.  This was copied from the MBCA
forums before they effectively killed it.  I met Bob Goodwin a few times,
retired Navy and a great guy.

There is one thing that I don't believe is covered as well as it should be
and that is the clutch coil. Yes, the clutch coil. Famous for burning out,
shorting out or just frying a few windings. Not enough to blow the fuse but
plenty to disrupt the speed comparator and shut off the compressor
permanently or intermittently.


Of all the troubleshooting steps, checking the compressor clutch coil is
cheap and relatively easy. Measure current with a clamp on amp meter.
Reading should be 3.75 A hot or 4.2 A cold. Resistance should be approx 3.5
ohms hot or 3.1 ohms cold.

Everytime I chased an elusive A/C compressor problem in a Mercedes, it
turned out to be a bad clutch. I don't spend near as much on A/C parts
anymore.

__
Robert Goodwin

Virginia Beach, Virginia
'87 300SDL
'95 E300D


-
Max
Charleston SC

On Fri, Jul 17, 2015 at 11:45 AM, Max Dillon dillonm...@gmail.com wrote:

 Wilton,

 I know that pulling the KLIMA relay will disable the AC compressor, that
 is located right behind the battery and fairly easy to get to, but may be
 pretty tight in the socket. A firm grip and gentle working while pulling up
 should free it. I don't know if a failing push-button unit would still blow
 the fuse if the KLIMA relay were removed.

 Pulling the plug on the top of the compressor would definitely isolate it,
 but that would also remove the compressor speed signal, which means the
 KLIMA relay would interrupt the power to the compressor clutch.

 A common cause of trouble in the AC compressor controls is a failing
 clutch that draws too much current. I'll have to search for a bit to find
 the normal amperage. I'd measure that current next if I were you, or is the
 test a resistance test? Need to start digging...
 --
 Max Dillon
 Charleston SC
 '87 300TD
 '95 E300

 On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes 
 mercedes@okiebenz.com wrote:

 Fan turns freely.

 SWMBO took car out late yesterday with A/C OFF; everything else as usual.
 Returned with fuse intact.

 What is best way to isolate compressor from the system with controls calling
 for cooling as usual?  Unplug wire on pressure switch at dryer?

 What is the likelihood of a glitche in the control unit causing the fuse
 to blow?

 Same for temp. sensor motor?

 Wilton

 - Original Message -
 From: Curly McLain via Mercedes mercedes@okiebenz.com
 To: Mercedes Discussion List mercedes@okiebenz.com
 Cc: Curly McLain 126die...@gmail.com
 Sent: Thursday, July 16, 2015 11:32 PM
 Subject: Re: [MBZ] Blown fuse


  I'd check the engine fan to be sure it turns freely.  I think it is one of

 the highest energy consumers in that list


 I removed the fuse placard and carefully cleaned away the soot and
 scorching as best I can.  I have deciphered the fuse #7 list to read:
 backup lamp, heating water valve, water pump, engine fan, heating system
 for washer jets, climate control system, relay aux fan term. 86, auto.
 trans. electrics, blower motor inside temp. sensor, air cond. compressor.
 (I filled in several obscured words with imagination and/or what I vaguely
 remember.  Can somebody please verify it for me?)

 Wilton

 - Original Message - From: WILTON via Mercedes
 mercedes@okiebenz.com
 To: Mercedes Discussion List mercedes@okiebenz.com
 Cc: WILTON wilt...@nc.rr.com
 Sent: Thursday, July 16, 2015 1:39 PM
 Subject: Re: [MBZ] Blown
 fuse


 #7 fuse has blown couple more times.  The placard inside the fuse box
 cover is scorched, obscuring the list of systems in addition to
 compressor on that fuse, and I can't open the pdf file showing such as I
 have many times before.  Can somebody, please, send me a photo of the
 placard or the appropriate pdf showing those items on fuse #7 for '87
 300D?

 Wilton

 - Original Message - From: WILTON via Mercedes
 mercedes@okiebenz.com
 To: mercedes list mercedes@okiebenz.com
 Cc: WILTON wilt...@nc.rr.com
 Sent: Tuesday, July 14, 2015 4:51 PM
 Subject: [MBZ] Blown fuse

 SWMBO came in from short trip in the '87 300D,
 leaned over back of chair
 in cool living room where I was napping and announced, Blown fuse in
 the car.  I was driving along with air conditioning blasting away
 nicely, and it just quit.  Don't ya think it's a blown fuse?

 I replied, Yep; sure hope that's all it is.  'Hobbled out to car
 thinking 30 amp blower fuse had blown.  Loosened the two mounting screws
 thinking the fuse would fall apart as I removed it, but it did not.
 Checked fuses in fuse box; 'found #7 (for compressor and coupla other
 things) blown.  Because of my shaky hands, called SWMBO to help me put
 blower fuse back in place and RR #7.  A/C blowing ice cold again.

 BTW, I did NOT change ALL the fuses.  ;)

 Wilton

Re: [MBZ] Blown fuse

2015-07-17 Thread Dan Penoff via Mercedes
Nothing.

If you short the terminals on the pressure switch the system would turn on *if* 
the charge or pressure was low. Otherwise, disconnecting it would have no 
effect.

I guess a pressure switch could fail grounded, but I've never heard of that 
happening.

Dan

Sent from my iPad

 On Jul 17, 2015, at 1:21 PM, WILTON via Mercedes mercedes@okiebenz.com 
 wrote:
 
 What would unplugging the wire on the pressure switch on the dryer isolate?
 
 BTW, 'replaced KLIMA coupla years ago.
 
 Wilton
 
 - Original Message - From: Max Dillon via Mercedes 
 mercedes@okiebenz.com
 To: Mercedes Discussion List mercedes@okiebenz.com
 Cc: Max Dillon dillonm...@gmail.com
 Sent: Friday, July 17, 2015 11:45 AM
 Subject: Re: [MBZ] Blown fuse
 
 
 Wilton,
 
 I know that pulling the KLIMA relay will disable the AC compressor, that is 
 located right behind the battery and fairly easy to get to, but may be 
 pretty tight in the socket.  A firm grip and gentle working while pulling up 
 should free it.  I don't know if a failing push-button unit would still blow 
 the fuse if the KLIMA relay were removed.
 
 Pulling the plug on the top of the compressor would definitely isolate it, 
 but that would also remove the compressor speed signal, which means the 
 KLIMA relay would interrupt the power to the compressor clutch.
 
 A common cause of trouble in the AC compressor controls is a failing clutch 
 that draws too much current.  I'll have to search for a bit to find the 
 normal amperage.  I'd measure that current next if I were you, or is the 
 test a resistance test?  Need to start digging...
 -- 
 Max Dillon
 Charleston SC
 '87 300TD
 '95 E300
 
 On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes 
 mercedes@okiebenz.com wrote:
 Fan turns freely.
 

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Re: [MBZ] Blown fuse

2015-07-17 Thread WILTON via Mercedes

What would unplugging the wire on the pressure switch on the dryer isolate?

BTW, 'replaced KLIMA coupla years ago.

Wilton

- Original Message - 
From: Max Dillon via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Max Dillon dillonm...@gmail.com
Sent: Friday, July 17, 2015 11:45 AM
Subject: Re: [MBZ] Blown fuse



Wilton,

I know that pulling the KLIMA relay will disable the AC compressor, that 
is located right behind the battery and fairly easy to get to, but may be 
pretty tight in the socket.  A firm grip and gentle working while pulling 
up should free it.  I don't know if a failing push-button unit would still 
blow the fuse if the KLIMA relay were removed.


Pulling the plug on the top of the compressor would definitely isolate it, 
but that would also remove the compressor speed signal, which means the 
KLIMA relay would interrupt the power to the compressor clutch.


A common cause of trouble in the AC compressor controls is a failing 
clutch that draws too much current.  I'll have to search for a bit to find 
the normal amperage.  I'd measure that current next if I were you, or is 
the test a resistance test?  Need to start digging...

--
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes 
mercedes@okiebenz.com wrote:

Fan turns freely.

SWMBO took car out late yesterday with A/C OFF; everything else as
usual.
Returned with fuse intact.

What is best way to isolate compressor from the system with controls
calling
for cooling as usual?  Unplug wire on pressure switch at dryer?

What is the likelihood of a glitche in the control unit causing the
fuse
to blow?

Same for temp. sensor motor?

Wilton

- Original Message - 
From: Curly McLain via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Curly McLain 126die...@gmail.com
Sent: Thursday, July 16, 2015 11:32 PM
Subject: Re: [MBZ] Blown fuse



I'd check the engine fan to be sure it turns freely.  I think it is

one of

the highest energy consumers in that list



I removed the fuse placard and carefully cleaned away the soot and
scorching as best I can.  I have deciphered the fuse #7 list to read:



backup lamp, heating water valve, water pump, engine fan, heating

system

for washer jets, climate control system, relay aux fan term. 86,

auto.

trans. electrics, blower motor inside temp. sensor, air cond.

compressor.

(I filled in several obscured words with imagination and/or what I

vaguely

remember.  Can somebody please verify it for me?)

Wilton

- Original Message - From: WILTON via Mercedes
mercedes@okiebenz.com
To: Mercedes Discussion List mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Thursday, July 16, 2015 1:39 PM
Subject: Re: [MBZ] Blown fuse



#7 fuse has blown couple more times.  The placard inside the fuse

box

cover is scorched, obscuring the list of systems in addition to
compressor on that fuse, and I can't open the pdf file showing such

as I

have many times before.  Can somebody, please, send me a photo of

the

placard or the appropriate pdf showing those items on fuse #7 for

'87

300D?

Wilton

- Original Message - From: WILTON via Mercedes
mercedes@okiebenz.com
To: mercedes list mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Tuesday, July 14, 2015 4:51 PM
Subject: [MBZ] Blown fuse


SWMBO came in from short trip in the '87 300D, leaned over back of

chair

in cool living room where I was napping and announced, Blown fuse

in

the car.  I was driving along with air conditioning blasting away
nicely, and it just quit.  Don't ya think it's a blown fuse?

I replied, Yep; sure hope that's all it is.  'Hobbled out to car
thinking 30 amp blower fuse had blown.  Loosened the two mounting

screws

thinking the fuse would fall apart as I removed it, but it did not.



Checked fuses in fuse box; 'found #7 (for compressor and coupla

other

things) blown.  Because of my shaky hands, called SWMBO to help me

put

blower fuse back in place and RR #7.  A/C blowing ice cold again.

BTW, I did NOT change ALL the fuses.  ;)

Wilton


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Re: [MBZ] Blown fuse

2015-07-17 Thread Dan Penoff via Mercedes
On the subject of the AC compressor clutch coil, I would inspect the wiring to 
it very carefully, as it can come loose from the tie wrap that secures it to 
the compressor, lean out somewhat, allowing it to rub against the back of the 
compressor pulley, which grounds it out and eventually cuts through it.

I say this as I found just that condition on my oldest son's former 300E.

Dan

Sent from my iPad

 On Jul 17, 2015, at 12:21 PM, Meade Dillon via Mercedes 
 mercedes@okiebenz.com wrote:
 
 Here's the troubleshooting info for the clutch coil, either read ohms or
 amps depending on your test equipment.  This was copied from the MBCA
 forums before they effectively killed it.  I met Bob Goodwin a few times,
 retired Navy and a great guy.
 
 There is one thing that I don't believe is covered as well as it should be
 and that is the clutch coil. Yes, the clutch coil. Famous for burning out,
 shorting out or just frying a few windings. Not enough to blow the fuse but
 plenty to disrupt the speed comparator and shut off the compressor
 permanently or intermittently.
 
 
 Of all the troubleshooting steps, checking the compressor clutch coil is
 cheap and relatively easy. Measure current with a clamp on amp meter.
 Reading should be 3.75 A hot or 4.2 A cold. Resistance should be approx 3.5
 ohms hot or 3.1 ohms cold.
 
 Everytime I chased an elusive A/C compressor problem in a Mercedes, it
 turned out to be a bad clutch. I don't spend near as much on A/C parts
 anymore.
 
 __
 Robert Goodwin
 
 Virginia Beach, Virginia
 '87 300SDL
 '95 E300D
 
 
 -
 Max
 Charleston SC
 
 On Fri, Jul 17, 2015 at 11:45 AM, Max Dillon dillonm...@gmail.com wrote:
 
 Wilton,
 
 I know that pulling the KLIMA relay will disable the AC compressor, that
 is located right behind the battery and fairly easy to get to, but may be
 pretty tight in the socket. A firm grip and gentle working while pulling up

___
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Re: [MBZ] Blown fuse

2015-07-17 Thread Dan Penoff via Mercedes
It is. I misunderstood the question.

It would isolate the compressor as far as I know.

I was thinking go/no go as far as the compressor turning on.

Dan

Sent from my iPad

On Jul 17, 2015, at 2:30 PM, fmiser via Mercedes mercedes@okiebenz.com wrote:

 Wilton wrote:
 
 What would unplugging the wire on the pressure switch on
 the dryer isolate?
 
 Dan wrote:
 
 Nothing.
 
 If you short the terminals on the pressure switch the
 system would turn on *if* the charge or pressure was low.
 Otherwise, disconnecting it would have no effect.
 
 Huh?
 
 Isn't the pressure switch in series with the compressor?
 
 With the switch unplugged, the compressor will NOT turn on -
 but all the blowers will run.  I don't know what other
 sub-systems will work or not - like will the aux fan turn
 on.  Unless the KLIMA is involved, on the older systems the
 pressure switch is in series with the compressor clutch.
 Thus unplugging that switch should isolate the compressor but
 let the rest of the system run.
 
 KLIMA and any computer control could make that invalid.
 
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Re: [MBZ] Blown fuse

2015-07-17 Thread WILTON via Mercedes
'Trying to determine if the compressor clutch is blowing the fuse or is the 
control unit blowing the fuse.
'Don't have clamp-on ammeter - just wanta turn on the system (control unit) 
and not have the compressor come on.


Wilton

- Original Message - 
From: Dan Penoff via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Dan Penoff d...@penoff.com
Sent: Friday, July 17, 2015 2:53 PM
Subject: Re: [MBZ] Blown fuse



It is. I misunderstood the question.

It would isolate the compressor as far as I know.

I was thinking go/no go as far as the compressor turning on.

Dan

Sent from my iPad

On Jul 17, 2015, at 2:30 PM, fmiser via Mercedes mercedes@okiebenz.com 
wrote:



Wilton wrote:

What would unplugging the wire on the pressure switch on
the dryer isolate?



Dan wrote:

Nothing.

If you short the terminals on the pressure switch the
system would turn on *if* the charge or pressure was low.
Otherwise, disconnecting it would have no effect.


Huh?

Isn't the pressure switch in series with the compressor?

With the switch unplugged, the compressor will NOT turn on -
but all the blowers will run.  I don't know what other
sub-systems will work or not - like will the aux fan turn
on.  Unless the KLIMA is involved, on the older systems the
pressure switch is in series with the compressor clutch.
Thus unplugging that switch should isolate the compressor but
let the rest of the system run.

KLIMA and any computer control could make that invalid.

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Re: [MBZ] Blown fuse

2015-07-17 Thread WILTON via Mercedes
Right now, I want just the compressor to NOT run - clutch not engage.  I'll 
try it.


Everything, 'cept compressor, control unit and temp. sensor motor ran 
yesterday afternoon, and fuse remained in tact, so, right now, I'm 
suspecting those three - just wanta try to isolate 'em one at a time.


Wilton

- Original Message - 
From: fmiser via Mercedes mercedes@okiebenz.com

To: mercedes@okiebenz.com
Cc: fmiser fmi...@gmail.com
Sent: Friday, July 17, 2015 2:30 PM
Subject: Re: [MBZ] Blown fuse



 Wilton wrote:

 What would unplugging the wire on the pressure switch on
 the dryer isolate?



Dan wrote:

Nothing.

If you short the terminals on the pressure switch the
system would turn on *if* the charge or pressure was low.
Otherwise, disconnecting it would have no effect.


Huh?

Isn't the pressure switch in series with the compressor?

With the switch unplugged, the compressor will NOT turn on -
but all the blowers will run.  I don't know what other
sub-systems will work or not - like will the aux fan turn
on.  Unless the KLIMA is involved, on the older systems the
pressure switch is in series with the compressor clutch.
Thus unplugging that switch should isolate the compressor but
let the rest of the system run.

KLIMA and any computer control could make that invalid.

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Re: [MBZ] Blown fuse

2015-07-17 Thread WILTON via Mercedes

'Thought so.

How can I isolate only the compressor?

Wilton

- Original Message - 
From: Dan Penoff via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Dan Penoff d...@penoff.com
Sent: Friday, July 17, 2015 1:32 PM
Subject: Re: [MBZ] Blown fuse



Nothing.

If you short the terminals on the pressure switch the system would turn on 
*if* the charge or pressure was low. Otherwise, disconnecting it would 
have no effect.


I guess a pressure switch could fail grounded, but I've never heard of 
that happening.


Dan

Sent from my iPad

On Jul 17, 2015, at 1:21 PM, WILTON via Mercedes mercedes@okiebenz.com 
wrote:


What would unplugging the wire on the pressure switch on the dryer 
isolate?


BTW, 'replaced KLIMA coupla years ago.

Wilton

- Original Message - From: Max Dillon via Mercedes 
mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Max Dillon dillonm...@gmail.com
Sent: Friday, July 17, 2015 11:45 AM
Subject: Re: [MBZ] Blown fuse



Wilton,

I know that pulling the KLIMA relay will disable the AC compressor, that 
is located right behind the battery and fairly easy to get to, but may 
be pretty tight in the socket.  A firm grip and gentle working while 
pulling up should free it.  I don't know if a failing push-button unit 
would still blow the fuse if the KLIMA relay were removed.


Pulling the plug on the top of the compressor would definitely isolate 
it, but that would also remove the compressor speed signal, which means 
the KLIMA relay would interrupt the power to the compressor clutch.


A common cause of trouble in the AC compressor controls is a failing 
clutch that draws too much current.  I'll have to search for a bit to 
find the normal amperage.  I'd measure that current next if I were you, 
or is the test a resistance test?  Need to start digging...

--
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes 
mercedes@okiebenz.com wrote:

Fan turns freely.



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Re: [MBZ] Blown fuse

2015-07-17 Thread Dan Penoff via Mercedes
Depends.

There are two things on taco pressure as far as I recall: The clutch coil and 
the speed pickup (Hall effect sensor, I believe.)

The wires all go through the same connector, I believe, so it would be 
difficult at best to separate them at the compressor. The only thing I can 
think of would be to try and pop the wire for the clutch out of the connector, 
and then apply a separate voltage source to it to measure the current draw.

??

Dan

Sent from my iPad

 On Jul 17, 2015, at 1:54 PM, WILTON via Mercedes mercedes@okiebenz.com 
 wrote:
 
 'Thought so.
 
 How can I isolate only the compressor?
 
 Wilton
 
 - Original Message - From: Dan Penoff via Mercedes 
 mercedes@okiebenz.com
 To: Mercedes Discussion List mercedes@okiebenz.com
 Cc: Dan Penoff d...@penoff.com
 Sent: Friday, July 17, 2015 1:32 PM
 Subject: Re: [MBZ] Blown fuse
 
 
 Nothing.
 
 If you short the terminals on the pressure switch the system would turn on 
 *if* the charge or pressure was low. Otherwise, disconnecting it would have 
 no effect.
 
 I guess a pressure switch could fail grounded, but I've never heard of that 
 happening.
 
 Dan
 
 Sent from my iPad
 
 On Jul 17, 2015, at 1:21 PM, WILTON via Mercedes mercedes@okiebenz.com 
 wrote:
 
 What would unplugging the wire on the pressure switch on the dryer isolate?
 
 BTW, 'replaced KLIMA coupla years ago.
 
 Wilton
 
 - Original Message - From: Max Dillon via Mercedes 
 mercedes@okiebenz.com
 To: Mercedes Discussion List mercedes@okiebenz.com
 Cc: Max Dillon dillonm...@gmail.com
 Sent: Friday, July 17, 2015 11:45 AM
 Subject: Re: [MBZ] Blown fuse
 
 
 Wilton,
 
 I know that pulling the KLIMA relay will disable the AC compressor, that 
 is located right behind the battery and fairly easy to get to, but may be 
 pretty tight in the socket.  A firm grip and gentle working while pulling 
 up should free it.  I don't know if a failing push-button unit would still 
 blow the fuse if the KLIMA relay were removed.
 
 Pulling the plug on the top of the compressor would definitely isolate it, 
 but that would also remove the compressor speed signal, which means the 
 KLIMA relay would interrupt the power to the compressor clutch.
 
 A common cause of trouble in the AC compressor controls is a failing 
 clutch that draws too much current.  I'll have to search for a bit to find 
 the normal amperage.  I'd measure that current next if I were you, or is 
 the test a resistance test?  Need to start digging...
 -- 
 Max Dillon
 Charleston SC
 '87 300TD
 '95 E300
 
 On July 17, 2015 11:22:19 AM EDT, WILTON via Mercedes 
 mercedes@okiebenz.com wrote:
 Fan turns freely.
 
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Re: [MBZ] Blown fuse

2015-07-17 Thread fmiser via Mercedes
  Wilton wrote:
  
  What would unplugging the wire on the pressure switch on
  the dryer isolate?

 Dan wrote:
 
 Nothing.
 
 If you short the terminals on the pressure switch the
 system would turn on *if* the charge or pressure was low.
 Otherwise, disconnecting it would have no effect.

Huh?

Isn't the pressure switch in series with the compressor?

With the switch unplugged, the compressor will NOT turn on -
but all the blowers will run.  I don't know what other
sub-systems will work or not - like will the aux fan turn
on.  Unless the KLIMA is involved, on the older systems the
pressure switch is in series with the compressor clutch.
Thus unplugging that switch should isolate the compressor but
let the rest of the system run.

KLIMA and any computer control could make that invalid.

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Re: [MBZ] Blown fuse

2015-07-17 Thread Peter Frederick via Mercedes
Use the economy mode on the climate control.  Works just like it  
does in normal mode.


Or you can unplug the connection for the clutch at the compressor.

Peter

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Re: [MBZ] Blown fuse

2015-07-17 Thread Curly McLain via Mercedes

This is for the Japanee compressor?  I assume not for the GM in the 123s?




Here's the troubleshooting info for the clutch coil, either read ohms or
amps depending on your test equipment.  This was copied from the MBCA
forums before they effectively killed it.  I met Bob Goodwin a few times,
retired Navy and a great guy.

There is one thing that I don't believe is covered as well as it should be
and that is the clutch coil. Yes, the clutch coil. Famous for burning out,
shorting out or just frying a few windings. Not enough to blow the fuse but
plenty to disrupt the speed comparator and shut off the compressor
permanently or intermittently.


Of all the troubleshooting steps, checking the compressor clutch coil is
cheap and relatively easy. Measure current with a clamp on amp meter.
Reading should be 3.75 A hot or 4.2 A cold. Resistance should be approx 3.5
ohms hot or 3.1 ohms cold.

Everytime I chased an elusive A/C compressor problem in a Mercedes, it
turned out to be a bad clutch. I don't spend near as much on A/C parts
anymore.

__
Robert Goodwin

Virginia Beach, Virginia
'87 300SDL
'95 E300D



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Re: [MBZ] Blown fuse

2015-07-16 Thread Curly McLain via Mercedes
I'd check the engine fan to be sure it turns freely.  I think it is 
one of the highest energy consumers in that list



I removed the fuse placard and carefully cleaned away the soot and 
scorching as best I can.  I have deciphered the fuse #7 list to 
read:  backup lamp, heating water valve, water pump, engine fan, 
heating system for washer jets, climate control system, relay aux 
fan term. 86, auto. trans. electrics, blower motor inside temp. 
sensor, air cond. compressor.  (I filled in several obscured words 
with imagination and/or what I vaguely remember.  Can somebody 
please verify it for me?)


Wilton

- Original Message - From: WILTON via Mercedes 
mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Thursday, July 16, 2015 1:39 PM
Subject: Re: [MBZ] Blown fuse


#7 fuse has blown couple more times.  The placard inside the fuse 
box cover is scorched, obscuring the list of systems in addition to 
compressor on that fuse, and I can't open the pdf file showing such 
as I have many times before.  Can somebody, please, send me a photo 
of the placard or the appropriate pdf showing those items on fuse 
#7 for '87 300D?


Wilton

- Original Message - From: WILTON via Mercedes 
mercedes@okiebenz.com

To: mercedes list mercedes@okiebenz.com
Cc: WILTON wilt...@nc.rr.com
Sent: Tuesday, July 14, 2015 4:51 PM
Subject: [MBZ] Blown fuse

SWMBO came in from short trip in the '87 300D, leaned over back of 
chair in cool living room where I was napping and announced, 
Blown fuse in the car.  I was driving along with air conditioning 
blasting away nicely, and it just quit.  Don't ya think it's a 
blown fuse?


I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting 
screws thinking the fuse would fall apart as I removed it, but it 
did not. Checked fuses in fuse box; 'found #7 (for compressor and 
coupla other things) blown.  Because of my shaky hands, called 
SWMBO to help me put blower fuse back in place and RR #7.  A/C 
blowing ice cold again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton


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Re: [MBZ] Blown fuse

2015-07-15 Thread Dan Penoff via Mercedes
They were? Of all the VWs I had I seem to recall a little plastic cover that 
went over them. There were like 8-10 in a row, and a cover the size of a candy 
bar that snapped over them...

MB went to blade type fuses in the facelift on W140 chassis cars between 95 and 
96. Don't know about other models. They also have a heck of a lot of them now, 
too. My W220 has three fuse boxes! The W140s have two, one in front, one in 
back.

Dan

Sent from my iPad

 On Jul 14, 2015, at 6:05 PM, Curly McLain via Mercedes 
 mercedes@okiebenz.com wrote:
 
 ATTABOY and ATTAGIRL!
 
 BTW, I never found that many blown fuses and never had much problem in MBs  I 
 twist em around sometimes if I think there may be a problem, but I've never 
 replaced good fuses for the fun of it.  A small way I differed from our 
 beloved Herr Doktor.  His climate in PA must have been different than mine.
 
 On the 56 Karmann GHia, I had fuse problems.  That is where I learned to 
 twist em.  Those were exposed under the hood.MB fuses in a nice tight 
 fusebox hold up well.
 
 CURIOSITY:
 
 Did MB ever stop using German (DIN?) fuses in favor of the 'merkun type?
 
 SWMBO came in from short trip in the '87 300D, leaned over back of chair in 
 cool living room where I was napping and announced, Blown fuse in the car.  
 I was driving along with air conditioning blasting away nicely, and it just 
 quit.  Don't ya think it's a blown fuse? 
 I replied, Yep; sure hope that's all it is.  'Hobbled out to car thinking 
 30 amp blower fuse had blown.  Loosened the two mounting screws thinking the 
 fuse would fall apart as I removed it, but it did not.   Checked fuses in 
 fuse box; 'found #7 (for compressor and coupla other things) blown.  Because 
 of my shaky hands, called SWMBO to help me put blower fuse back in place and 
 RR #7.  A/C blowing ice cold again.
 
 BTW, I did NOT change ALL the fuses.  ;)
 
 Wilton
 
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Re: [MBZ] Blown fuse

2015-07-15 Thread Dan Penoff via Mercedes
Metal fatigue and a very small cross sectional contact area. Sometimes you 
would grab the fuse to twist it and the element would just fall apart, much 
like the strip fuses they used in higher current applications do.  In some 
cases aluminum was used for fuse elements, too. Can't imagine the point of 
contact between aluminum and copper being a good thing. Not sure why, as I'm no 
metallurgist, but it just doesn't sound good to have dissimilar metals in 
contact like that

Dan

Sent from my iPad

 - Original Message - From: Randy Bennell via Mercedes 
 To: Mercedes Discussion List mercedes@okiebenz.com
 Cc: Randy Bennell rbenn...@bennell.ca
 Sent: Tuesday, July 14, 2015 6:56 PM
 Subject: Re: [MBZ] Blown fuse
 
 
 Tired fuse?
 Otherwise, why did Dr. Booth recommend changing them out?
 RB
 On 14/07/2015 5:54 PM, WILTON via Mercedes wrote:
 Yep, that's an unanswered question, so far.  Smart ass answer is, 
 Something pulling too many amps.   ;)
 
 Wilton
 
 - Original Message - From: Rich Thomas via Mercedes 
 mercedes@okiebenz.com
 To: mercedes@okiebenz.com
 Cc: Rich Thomas richthomas79td...@constructivity.net
 Sent: Tuesday, July 14, 2015 5:53 PM
 Subject: Re: [MBZ] Blown fuse
 
 
 AC BLOWS ICE COLD
 
 Question is, why did the fuse blow?
 
 --R
 
 
 
 On 7/14/15 4:51 PM, WILTON via Mercedes wrote:
 SWMBO came in from short trip in the '87 300D, leaned over back of chair 
 in cool living room where I was napping and announced, Blown fuse in the 
 car.  I was driving along with air conditioning blasting away nicely, and 
 it just quit.  Don't ya think it's a blown fuse?
 
 I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
 thinking 30 amp blower fuse had blown.  Loosened the two mounting screws 
 thinking the fuse would fall apart as I removed it, but it did not. 
 Checked fuses in fuse box; 'found #7 (for compressor and coupla other 
 things) blown.  Because of my shaky hands, called SWMBO to help me put 
 blower fuse back in place and RR #7.  A/C blowing ice cold again.
 
 BTW, I did NOT change ALL the fuses.  ;)
 
 Wilton
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Re: [MBZ] Blown fuse

2015-07-15 Thread WILTON via Mercedes
No metallurgist here, either, but it's Galvanic action resulting from the 
electric potential between dissimilar metals - copper is slightly more 
noble than aluminum.  The Galvanic action removes ions from the less noble 
metal - i. e., corrosion of the aluminum.


Wilton

- Original Message - 
From: Dan Penoff via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Dan Penoff d...@penoff.com
Sent: Wednesday, July 15, 2015 8:51 AM
Subject: Re: [MBZ] Blown fuse


Metal fatigue and a very small cross sectional contact area. Sometimes you 
would grab the fuse to twist it and the element would just fall apart, 
much like the strip fuses they used in higher current applications do. 
In some cases aluminum was used for fuse elements, too. Can't imagine the 
point of contact between aluminum and copper being a good thing. Not sure 
why, as I'm no metallurgist, but it just doesn't sound good to have 
dissimilar metals in contact like that


Dan

Sent from my iPad


- Original Message - From: Randy Bennell via Mercedes
To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Randy Bennell rbenn...@bennell.ca
Sent: Tuesday, July 14, 2015 6:56 PM
Subject: Re: [MBZ] Blown fuse



Tired fuse?
Otherwise, why did Dr. Booth recommend changing them out?
RB

On 14/07/2015 5:54 PM, WILTON via Mercedes wrote:
Yep, that's an unanswered question, so far.  Smart ass answer is, 
Something pulling too many amps.   ;)


Wilton

- Original Message - From: Rich Thomas via Mercedes 
mercedes@okiebenz.com

To: mercedes@okiebenz.com
Cc: Rich Thomas richthomas79td...@constructivity.net
Sent: Tuesday, July 14, 2015 5:53 PM
Subject: Re: [MBZ] Blown fuse



AC BLOWS ICE COLD

Question is, why did the fuse blow?

--R




On 7/14/15 4:51 PM, WILTON via Mercedes wrote:
SWMBO came in from short trip in the '87 300D, leaned over back of 
chair in cool living room where I was napping and announced, Blown 
fuse in the car.  I was driving along with air conditioning blasting 
away nicely, and it just quit.  Don't ya think it's a blown fuse?


I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting 
screws thinking the fuse would fall apart as I removed it, but it did 
not. Checked fuses in fuse box; 'found #7 (for compressor and coupla 
other things) blown.  Because of my shaky hands, called SWMBO to help 
me put blower fuse back in place and RR #7.  A/C blowing ice cold 
again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton
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Re: [MBZ] Blown fuse

2015-07-14 Thread Rich Thomas via Mercedes

AC BLOWS ICE COLD

Question is, why did the fuse blow?

--R



On 7/14/15 4:51 PM, WILTON via Mercedes wrote:

SWMBO came in from short trip in the '87 300D, leaned over back of chair in cool living 
room where I was napping and announced, Blown fuse in the car.  I was driving along 
with air conditioning blasting away nicely, and it just quit.  Don't ya think it's a 
blown fuse?

I replied, Yep; sure hope that's all it is.  'Hobbled out to car thinking 30 amp 
blower fuse had blown.  Loosened the two mounting screws thinking the fuse would fall apart 
as I removed it, but it did not.   Checked fuses in fuse box; 'found #7 (for compressor and 
coupla other things) blown.  Because of my shaky hands, called SWMBO to help me put blower 
fuse back in place and RR #7.  A/C blowing ice cold again.

BTW, I did NOT change ALL the fuses.  ;)

Wilton
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Re: [MBZ] Blown fuse

2015-07-14 Thread Curly McLain via Mercedes

ATTABOY and ATTAGIRL!

BTW, I never found that many blown fuses and never had much problem 
in MBs  I twist em around sometimes if I think there may be a 
problem, but I've never replaced good fuses for the fun of it.  A 
small way I differed from our beloved Herr Doktor.  His climate in PA 
must have been different than mine.


On the 56 Karmann GHia, I had fuse problems.  That is where I learned 
to twist em.  Those were exposed under the hood.MB fuses in a 
nice tight fusebox hold up well.


CURIOSITY:

Did MB ever stop using German (DIN?) fuses in favor of the 'merkun type?

SWMBO came in from short trip in the '87 300D, leaned over back of 
chair in cool living room where I was napping and announced, Blown 
fuse in the car.  I was driving along with air conditioning blasting 
away nicely, and it just quit.  Don't ya think it's a blown fuse? 

I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting 
screws thinking the fuse would fall apart as I removed it, but it 
did not.   Checked fuses in fuse box; 'found #7 (for compressor and 
coupla other things) blown.  Because of my shaky hands, called SWMBO 
to help me put blower fuse back in place and RR #7.  A/C blowing 
ice cold again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton


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Re: [MBZ] Blown fuse

2015-07-14 Thread fmiser via Mercedes
 Curly wrote:
 
 ATTABOY and ATTAGIRL!

I'll echo that!

 On the 56 Karmann GHia, I had fuse problems.  That is where
 I learned to twist em.  Those were exposed under the
 hood.MB fuses in a nice tight fusebox hold up well.

A bit of grease on the ends of the fuses helps too. *smiles*

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Re: [MBZ] Blown fuse

2015-07-14 Thread WILTON via Mercedes
Yep, that's an unanswered question, so far.  Smart ass answer is, Something 
pulling too many amps.   ;)


Wilton

- Original Message - 
From: Rich Thomas via Mercedes mercedes@okiebenz.com

To: mercedes@okiebenz.com
Cc: Rich Thomas richthomas79td...@constructivity.net
Sent: Tuesday, July 14, 2015 5:53 PM
Subject: Re: [MBZ] Blown fuse



AC BLOWS ICE COLD

Question is, why did the fuse blow?

--R



On 7/14/15 4:51 PM, WILTON via Mercedes wrote:
SWMBO came in from short trip in the '87 300D, leaned over back of chair 
in cool living room where I was napping and announced, Blown fuse in the 
car.  I was driving along with air conditioning blasting away nicely, and 
it just quit.  Don't ya think it's a blown fuse?


I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting screws 
thinking the fuse would fall apart as I removed it, but it did not. 
Checked fuses in fuse box; 'found #7 (for compressor and coupla other 
things) blown.  Because of my shaky hands, called SWMBO to help me put 
blower fuse back in place and RR #7.  A/C blowing ice cold again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton
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Re: [MBZ] Blown fuse

2015-07-14 Thread Randy Bennell via Mercedes


Tired fuse?
Otherwise, why did Dr. Booth recommend changing them out?

RB


On 14/07/2015 5:54 PM, WILTON via Mercedes wrote:
Yep, that's an unanswered question, so far.  Smart ass answer is, 
Something pulling too many amps.   ;)


Wilton

- Original Message - From: Rich Thomas via Mercedes 
mercedes@okiebenz.com

To: mercedes@okiebenz.com
Cc: Rich Thomas richthomas79td...@constructivity.net
Sent: Tuesday, July 14, 2015 5:53 PM
Subject: Re: [MBZ] Blown fuse



AC BLOWS ICE COLD

Question is, why did the fuse blow?

--R



On 7/14/15 4:51 PM, WILTON via Mercedes wrote:
SWMBO came in from short trip in the '87 300D, leaned over back of 
chair in cool living room where I was napping and announced, Blown 
fuse in the car.  I was driving along with air conditioning blasting 
away nicely, and it just quit.  Don't ya think it's a blown fuse?


I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting 
screws thinking the fuse would fall apart as I removed it, but it 
did not. Checked fuses in fuse box; 'found #7 (for compressor and 
coupla other things) blown.  Because of my shaky hands, called SWMBO 
to help me put blower fuse back in place and RR #7.  A/C blowing 
ice cold again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton
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Re: [MBZ] Blown fuse

2015-07-14 Thread WILTON via Mercedes

'Could be.

Wilton

- Original Message - 
From: Randy Bennell via Mercedes mercedes@okiebenz.com

To: Mercedes Discussion List mercedes@okiebenz.com
Cc: Randy Bennell rbenn...@bennell.ca
Sent: Tuesday, July 14, 2015 6:56 PM
Subject: Re: [MBZ] Blown fuse




Tired fuse?
Otherwise, why did Dr. Booth recommend changing them out?

RB


On 14/07/2015 5:54 PM, WILTON via Mercedes wrote:
Yep, that's an unanswered question, so far.  Smart ass answer is, 
Something pulling too many amps.   ;)


Wilton

- Original Message - From: Rich Thomas via Mercedes 
mercedes@okiebenz.com

To: mercedes@okiebenz.com
Cc: Rich Thomas richthomas79td...@constructivity.net
Sent: Tuesday, July 14, 2015 5:53 PM
Subject: Re: [MBZ] Blown fuse



AC BLOWS ICE COLD

Question is, why did the fuse blow?

--R



On 7/14/15 4:51 PM, WILTON via Mercedes wrote:
SWMBO came in from short trip in the '87 300D, leaned over back of 
chair in cool living room where I was napping and announced, Blown 
fuse in the car.  I was driving along with air conditioning blasting 
away nicely, and it just quit.  Don't ya think it's a blown fuse?


I replied, Yep; sure hope that's all it is.  'Hobbled out to car 
thinking 30 amp blower fuse had blown.  Loosened the two mounting 
screws thinking the fuse would fall apart as I removed it, but it 
did not. Checked fuses in fuse box; 'found #7 (for compressor and 
coupla other things) blown.  Because of my shaky hands, called SWMBO 
to help me put blower fuse back in place and RR #7.  A/C blowing 
ice cold again.


BTW, I did NOT change ALL the fuses.  ;)

Wilton
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Re: [MBZ] Blown fuse

2015-07-14 Thread Andrew Strasfogel via Mercedes
I long ago upped the fuse rating on my 123 blower circuit.

On Tue, Jul 14, 2015 at 8:04 PM, fmiser via Mercedes mercedes@okiebenz.com
wrote:

  Curly wrote:
 
  ATTABOY and ATTAGIRL!

 I'll echo that!

  On the 56 Karmann GHia, I had fuse problems.  That is where
  I learned to twist em.  Those were exposed under the
  hood.MB fuses in a nice tight fusebox hold up well.

 A bit of grease on the ends of the fuses helps too. *smiles*

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 To Unsubscribe or change delivery options go to:
 http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com


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Re: [MBZ] Blown Fuse

2006-04-17 Thread Peter Frederick
My brother and I spend about five hours fixing that exact problem in 
his SDL -- fuse would blow internittantly, and we started checking 
interior lamps -- big current draw.


I found the wires for the trunk lamp completely bare of insulation at 
the hinge where there is a small clip.  Completely shorted and 
insulation melted.  We had to remove the rear seat, cut the harness 
open, and replace quite a bit of wire as the short had melted wires 
together and caused insulation failure all the way up to the left rear 
lamp assembly.  I got to do all the in the trunk upside down stuff 
since his neck is fused from C2 to C5.


Peter




Re: [MBZ] Blown Fuse

2006-04-17 Thread Zoltan Finks
Ah. A creature comfort I can actually brag over some one. My 83 240D has the
timed dome - takes about 6 or 7 seconds. Good luck with your problem
hunting.

Brian
83 240D


On 4/16/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:

 Thanks Luther-
 My entry level 240D doesn't have any of them fancy timed lights. ;-)  My
 91 300D does have the timed lights and it;s really cool -
 Thanks again !

 Sincerely,
 Larry T ('74 911, '67 MGB, 91 300D Turbo)
 A Blood Test for your oil - www.youroil.net
 For Test Results http://members.rennlist.com/oil
 Weber Carb Stuff http://members.rennlist.com/webercarbs
 http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
 - Original Message -
 From: Luther Gulseth [EMAIL PROTECTED]
 To: Mercedes Discussion List [EMAIL PROTECTED]
 Sent: Sunday, April 16, 2006 1:47 PM
 Subject: Re: [MBZ] Blown Fuse


  Check the timed light.  My SD timed light had a bad diode that caused it
  to blow a fuse, and if it didn't blow the fuse, it'd blow a trace on the
  circuit board in the light.
 
  On Sun, 16 Apr 2006 12:40:01 -0500, [EMAIL PROTECTED] wrote:
 
  Howdy -
  My 78 240D is blowing the fuse that controls the interior overhead
 lights
  and clock (maybe other things also - haven't checked yet) and I'm
  wondering
  if there's a trouble spot I should check first?   Else I'll have to do
 it
  the old fashioned way  start troublechecking this week unless someone
  points me in the right direction.
 
  TIA --
 
  Sincerely,
  Larry T ('74 911, '67 MGB, 91 300D Turbo)
  A Blood Test for your oil - www.youroil.net
  For Test Results http://members.rennlist.com/oil
  Weber Carb Stuff http://members.rennlist.com/webercarbs
  http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
 
 
 
 
 
  --
  Luther   KB5QHU
  Alma, Ark
  '83 300SD (231,xxx kmi)
  '82 300CD (159,xxx kmi)
  '82 300D  (74,000 kmi) needs MAJOR work
 
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Re: [MBZ] Blown Fuse

2006-04-16 Thread Luther Gulseth
Check the timed light.  My SD timed light had a bad diode that caused it  
to blow a fuse, and if it didn't blow the fuse, it'd blow a trace on the  
circuit board in the light.


On Sun, 16 Apr 2006 12:40:01 -0500, [EMAIL PROTECTED] wrote:


Howdy -
My 78 240D is blowing the fuse that controls the interior overhead lights
and clock (maybe other things also - haven't checked yet) and I'm  
wondering

if there's a trouble spot I should check first?   Else I'll have to do it
the old fashioned way  start troublechecking this week unless someone
points me in the right direction.

TIA --

Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info






--
Luther   KB5QHU
Alma, Ark
'83 300SD (231,xxx kmi)
'82 300CD (159,xxx kmi)
'82 300D  (74,000 kmi) needs MAJOR work



Re: [MBZ] Blown Fuse

2006-04-16 Thread Marshall Booth

[EMAIL PROTECTED] wrote:

Howdy -
My 78 240D is blowing the fuse that controls the interior overhead lights 
and clock (maybe other things also - haven't checked yet) and I'm wondering 
if there's a trouble spot I should check first?   Else I'll have to do it 
the old fashioned way  start troublechecking this week unless someone 
points me in the right direction.


Fuse F-2 feeds the clock, trunk light, power antenna, front and rear 
cabin lights (and their switches on all four door) the warning buzzer 
and hazard lamp timer assembly. I MAY have forgotten a few items.


I'd pay particular attention to the wire(s) going to the trunk light 
(may break from excessive flexing).


Marshall
--
  Marshall Booth (who doesn't respond to unsigned questions)
  der Dieseling Doktor [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 
190D 2.2 229Kmi (retired)




Re: [MBZ] Blown Fuse

2006-04-16 Thread l02turner

Thanks Marshall -
When you mentioend the truck light it reminded me I added a brighter light 
back there - it's very possible the connection came loose or the wire 
broke -- 
Thanks for the help!!
I'd have started elsewhere and lost time.  I bet I have a wiring problem 
with that new light -- will check tomorrow -- 


Thanks again.
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
- Original Message - 
From: Marshall Booth [EMAIL PROTECTED]

To: Mercedes Discussion List [EMAIL PROTECTED]
Sent: Sunday, April 16, 2006 2:43 PM
Subject: Re: [MBZ] Blown Fuse



[EMAIL PROTECTED] wrote:

Howdy -
My 78 240D is blowing the fuse that controls the interior overhead lights
and clock (maybe other things also - haven't checked yet) and I'm 
wondering

if there's a trouble spot I should check first?   Else I'll have to do it
the old fashioned way  start troublechecking this week unless someone
points me in the right direction.


Fuse F-2 feeds the clock, trunk light, power antenna, front and rear
cabin lights (and their switches on all four door) the warning buzzer
and hazard lamp timer assembly. I MAY have forgotten a few items.

I'd pay particular attention to the wire(s) going to the trunk light
(may break from excessive flexing).

Marshall
--
  Marshall Booth (who doesn't respond to unsigned questions)
  der Dieseling Doktor [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84
190D 2.2 229Kmi (retired)

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Re: [MBZ] Blown Fuse

2006-04-16 Thread l02turner

Thanks Luther-
My entry level 240D doesn't have any of them fancy timed lights. ;-)  My 
91 300D does have the timed lights and it;s really cool -

Thanks again !

Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
- Original Message - 
From: Luther Gulseth [EMAIL PROTECTED]

To: Mercedes Discussion List [EMAIL PROTECTED]
Sent: Sunday, April 16, 2006 1:47 PM
Subject: Re: [MBZ] Blown Fuse



Check the timed light.  My SD timed light had a bad diode that caused it
to blow a fuse, and if it didn't blow the fuse, it'd blow a trace on the
circuit board in the light.

On Sun, 16 Apr 2006 12:40:01 -0500, [EMAIL PROTECTED] wrote:


Howdy -
My 78 240D is blowing the fuse that controls the interior overhead lights
and clock (maybe other things also - haven't checked yet) and I'm
wondering
if there's a trouble spot I should check first?   Else I'll have to do it
the old fashioned way  start troublechecking this week unless someone
points me in the right direction.

TIA --

Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info






--
Luther   KB5QHU
Alma, Ark
'83 300SD (231,xxx kmi)
'82 300CD (159,xxx kmi)
'82 300D  (74,000 kmi) needs MAJOR work

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