Leo John Costigan
Mon, 08 Feb 2010 13:44:49 -0800
At this point before I would buy new gages I would split the dash harness between the cluster plug and fuse box and check for melted or shorted wires. Also I would recheck all grounds to cluster and maybe run a direct ground from the battery to the cluster, straight wire.
With the sending unit plugs disconnected and then shorted to ground you should
have some type of movement in the gage.
If there were a short or open in the harness nothing would change by removing
the plugs from the senders.
Leo
----- Original Message -----
From: rml...@comcast.net
To: The Chevelle Mailing List
Sent: Monday, February 08, 2010 12:49 PM
Subject: Re: [Chevelle-list] wiring question
I have voltage at my guages, and I have voltage on the lines to my sending
units ie. temp. and fuel. I disconnected the plug in the trunk and checked for
voltage which tested ok. However when I unplugged it my guage didn't respond by
going to full. Iam thinking maby I need new guages. I did the same with the
temp. I checked for voltage by disconnecting the line at the temp. sending unit
and got a voltage reading. However, the guage didn't respond to being
disconnected or grounded. Do yall think maby I need new guages.Thanks to you
all for all your help.
----- Original
Message -----
From: 327mal...@gmail.com
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Sunday, February 7, 2010 10:37:50 AM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
I don't know if this will help you but give it a look.
The Chevelle Engineer
http://chevelleengineer.home.comcast.net/~chevelleengineer/fuelgage.htm
----- Original Message -----
From: rml...@comcast.net
To: The Chevelle Mailing List
Sent: Tuesday, February 02, 2010 7:53 PM
Subject: Re: [Chevelle-list] wiring question
Jim I appriciate your help. It seems to me Iam being told 2 different
things here. Leo say's there should be no power at pins 10 and 11 and it sounds
to me like your telling me there should be power at those pins. I dont
understand the principles of operation here. I dont understand how they work.I
hope someone here can explain to me exactly how it works. Does 12 volts go
through the guage and the sending units add resistance to ground. Thanks every
body for your help here. I just wanna get my guages working.
----- Original Message -----
From: "Jim Thompson" jimthompso...@gmail.com
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Tuesday, February 2, 2010 7:10:29 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
I will suggest again that ground is critical. Your fuel sending unit should
have its own ground wire. The temp sending unit is hot, internally the switch
closes to ground. With the key to “on” both should be hot. Your fuse box should
have one fuse marked “gauges” if it is hot on both sides. Then it is a ground
issue or short in the gauge harness.
From: chevelle-list-boun...@chevelles.net
[mailto:chevelle-list-boun...@chevelles.net] On Behalf Of rml...@comcast.net
Sent: Tuesday, February 02, 2010 4:25 PM
To: The Chevelle Mailing List
Subject: Re: [Chevelle-list] wiring question
Does anyone know where the voltage for the fuel and temp. guages is fed
from. I have voltage to everything except these two guages. I unplugged the 12
pin connector that plugs into the pcb and checked for voltage there.
everything is hot with the exception of temp and fuel. all my fuses are good.
Any ideas.Thanks, Bob
----- Original Message -----
From: dhoesc...@granitecityperformance.com
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 10:03:58 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
I would suggest disconnecting the tan fuel sender feed wire at the fuel
tank. Turn the key to RUN position and wait a few moments (some gauges are
slow) with the tan wire disconnected the fuel gauge should read past full. Then
ground the tan wire anywhere to the body and the gauge should read empty. If
you get no response then you have a bad gauge or a wiring problem.
-----Original Message-----
From: "Tom Rightler" <bluess...@comcast.net>
Sent: Monday, February 1, 2010 20:47
To: "'The Chevelle Mailing List'" <chevelle-list@chevelles.net>
Subject: Re: [Chevelle-list] wiring question
If you want to check the gauges, send 12 volts directly to them and see if
the needle moves. If the needle moves, the gauges is good and there are wiring
issues elsewhere. I’ve seen brand new sending units fail. There should be 12
volts at the bulkhead connector with the key in the run position for all wiring
to the gauges.
Tom
-----Original Message-----
From: chevelle-list-boun...@chevelles.net
[mailto:chevelle-list-boun...@chevelles.net] On Behalf Of rml...@comcast.net
Sent: Monday, February 01, 2010 9:01 PM
To: The Chevelle Mailing List
Subject: Re: [Chevelle-list] wiring question
The sending. unit is grounded to the body, and the temp sending unit is
new. Tom,do you know if there would or should be voltage at the 12 point
connection into the pcb. for the temp and fuel guages
----- Original Message -----
From: "Tom Rightler" <bluess...@comcast.net>
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 8:53:30 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
Is the fuel sending unit grounded to the body? If the temp gauge isn’t
working, it’s usually a problem with the sending unit screwed into the head.
Tom Rightler
MCC Newsletter Editor
http://www.chevelles.net/mcc
-----Original Message-----
From: chevelle-list-boun...@chevelles.net
[mailto:chevelle-list-boun...@chevelles.net] On Behalf Of rml...@comcast.net
Sent: Monday, February 01, 2010 8:32 PM
To: The Chevelle Mailing List
Subject: Re: [Chevelle-list] wiring question
I'am a firm beliver that there is no such thing as a dumb question. My dash
lights are working fine. the dimmer switch is working I just dont have a temp.
guage or a fuel guage.
----- Original Message -----
From: dhoesc...@granitecityperformance.com
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 8:25:13 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
Forgive me if it's a dumb question...did you try rotating the knob? I
don't know if 1970 had the "dimmer" built into the headlight switch perhaps
it's turned down to the lowest setting or the rheostat is burnt out?
Second, did you check for power at the fuse?
-----Original Message-----
From: rml...@comcast.net
Sent: Monday, February 1, 2010 19:08
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Subject: Re: [Chevelle-list] wiring question
Yes I do have a schematic. I have a 70 ss with guages. Iam just not sure
why the guages are not working.
----- Original Message -----
From: dhoesc...@granitecityperformance.com
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 7:27:55 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
Do you have a wiring schematic -or- would it help if you had one? What
year Chevelle do you have?
-----Original Message-----
From: rml...@comcast.net
Sent: Monday, February 1, 2010 17:02
To: dansolo...@msn.com, "The Chevelle Mailing List"
<chevelle-list@chevelles.net>
Subject: Re: [Chevelle-list] wiring question
Dan, The guages are not new nor is the engine harness or the dash harness.
And no the guages did not work before. I was hoping that putting a new pcb. in
would get them working. All the wiring is still original to the car. I did put
voltage to the gas guage when I had it on the bench and was able to get
movement. I used a 9 volt battery and the guage moved to around 1/2 tank. I
then reversed the polarity and the guage went back to E. So with that said I
kinda assumed the guages were o k. I really appriciate your efforts, Keep
pitching maby eventually I'll get a hit. Thanks Bob
----- Original Message -----
From: "Dan Solomon" <dansolo...@msn.com>
To: "Chevelle List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 5:34:52 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
Are the gauges new? How about the dash harness and the engine harness? Did
the gauges work before you made your changes? The reason I ask is that the pins
are in different locations at the firewall. If one harness is from a 70 and one
from a 71-72 that may cause your problem.
Thanks, Dan
--------------------------
Sent using BlackBerry
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From: rml...@comcast.net
Date: Mon, 1 Feb 2010 21:54:45 +0000 (UTC)
To: <dansolo...@msn.com>; The Chevelle Mailing
List<chevelle-list@chevelles.net>
Subject: Re: [Chevelle-list] wiring question
Dan, I did ground the cluster with one of the screws that attach the metal
to the plastic housing. And all my lights are working, dash lights, head
lights, but none of my guages are working. Fuel, temp, or amp. All of my fuses
are good. Any ideas. Thanks Bob
----- Original Message -----
From: "Dan Solomon" <dansolo...@msn.com>
To: "Chevelle List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 4:41:31 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
Bob,
I don't remember if all of the wires in the connector are hot but you do
need ground to the cluster. Use one of the screws that attach the metal cover
to the plastic housing. Don't use the ones that attach the PCB.
When you say your lights are working do you mean dash lights or headlights?
Thanks, Dan
--------------------------
Sent using BlackBerry
----------------------------------------------------------------------------
From: rml...@comcast.net
Date: Mon, 1 Feb 2010 20:56:09 +0000 (UTC)
To: The Chevelle Mailing List<chevelle-list@chevelles.net>
Subject: Re: [Chevelle-list] wiring question
Thanks, Dan. Should I have a voltage at each pin on the 12 pin
connector.ie.the fuel, temp, and amp. My lights are working, I didn't put a
ground on the guage cluster itself. can that go on any screw on the back of the
cluster. All the screws on the back go through the pcb.
----- Original Message -----
From: "Dan Solomon" <dansolo...@msn.com>
To: "The Chevelle Mailing List" <chevelle-list@chevelles.net>
Sent: Monday, February 1, 2010 10:04:44 AM GMT -05:00 US/Canada Eastern
Subject: Re: [Chevelle-list] wiring question
I had a hell of a time with the dash in my 70. Must have pulled it out and
put it back in 6 times. Make sure that you have the three black ground wires
hooked up. One goes to a screw on the cluster, one to the metal frame of the
dash carrier and one to the e-brake. Also did you put the ground strap back in
under the light switch?
My problem turned out to be the headlight switch. Power to the cluster
passes through this switch. One of the spades slipped out aside the connector
and was not making contact. Here is the topic on chevelles.com. It has some
great pics and information to diagnose the headlight switch. It also includes
information on the 12 pin connector and tests to verify voltage at the fusebox.
http://www.chevelles.com/forums/showthread.php?t=260728&highlight=hot+wires+SS+dash
Dan
"It is a mistake to allow any mechanical object to realize you are in a
hurry."
http://www.freewebs.com/chevelles1970/
----------------------------------------------------------------------------
Date: Mon, 1 Feb 2010 10:06:28 +0000
From: rml...@comcast.net
To: Chevelle-list@chevelles.net
Subject: [Chevelle-list] wiring question
I set my restored dash in place and connected the wires, turned the key to
acess. and my temp. fuel, and amp guages did nothing. Should there be a voltage
at the 12 point plug for each of these three guages. My dash lights work. Turn
signals work. brake lights. All the lights are working. Iam stumped. Any
ideas,Thanks. Frustrated.
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