[Chevelle-list] wiring question

Mon Feb 1 22:03:58 EST 2010

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" <bluess454 at comcast.net>
Sent: Monday, February 1, 2010 20:47
To: "'The Chevelle Mailing List'" <chevelle-list at chevelles.net>
Subject: Re: [Chevelle-list] wiring question

If you want to check the gauges, send 12volts directly to them and see if the needle moves.  If the needle moves, the gaugesis good and there are wiring issues elsewhere.  I’ve seen brand new sendingunits fail.  There should be 12 volts at the bulkhead connector with the key inthe run position for all wiring to the gauges.

Tom

-----Original Message-----
From:chevelle-list-bounces at chevelles.net[mailto:chevelle-list-bounces at chevelles.net] OnBehalf Of rml438 at comcast.net
Sent: Monday, February 01, 20109:01 PM
To: The Chevelle Mailing List
Subject: Re: [Chevelle-list]wiring question

The sending. unit is grounded to the body, andthe temp sending unit is new. Tom,do you know if there would or should bevoltage at the 12 point  connection into the pcb. for the temp and fuelguages
----- Original Message -----
From: "Tom Rightler" <bluess454 at comcast.net>
To: "The Chevelle Mailing List" <chevelle-list at 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 unitgrounded to the body?  If the temp gauge isn’t working, it’s usually a problemwith the sending unit screwed into the head.

Tom Rightler
MCC NewsletterEditor
http://www.chevelles.net/mcc

-----OriginalMessage-----
From:chevelle-list-bounces at chevelles.net [mailto:chevelle-list-bounces at chevelles.net]On Behalf Of rml438 at comcast.net
Sent: Monday, February 01, 20108:32 PM
To: The Chevelle Mailing List
Subject: Re: [Chevelle-list]wiring question

I'am a firm beliver that there is no such thingas a dumb question. My dash lights are working fine. the dimmer switch isworking I just dont have a temp. guage or a fuel guage.
----- Original Message -----
From: dhoeschen at granitecityperformance.com
To: "The Chevelle Mailing List" <chevelle-list at 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 ifit's a dumb question...did you try rotating the knob?  I don't know if1970 had the "dimmer" built into the headlight switch perhaps it'sturned down to the lowest setting or the rheostat is burnt out?

Second, did you check for power at the fuse?

-----Original Message-----
From: rml438 at comcast.net
Sent: Monday, February 1, 2010 19:08
To: "The Chevelle Mailing List" <chevelle-list at chevelles.net>
Subject: Re: [Chevelle-list] wiring question

Yes I do have a schematic. I have a 70 ss withguages. Iam just not sure why the guages are not working.
----- Original Message -----
From: dhoeschen at granitecityperformance.com
To: "The Chevelle Mailing List" <chevelle-list at 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 awiring schematic -or- would it help if you had one?  What year Chevelle doyou have?

-----Original Message-----
From: rml438 at comcast.net
Sent: Monday, February 1, 2010 17:02
To: dansolomon at msn.com, "The Chevelle Mailing List"<chevelle-list at chevelles.net>
Subject: Re: [Chevelle-list] wiring question

Dan, The guages are not new nor is the engineharness or the dash harness. And no the guages did not work before. I washoping that putting a new pcb. in would get them working. All the wiring isstill original to the car. I did put voltage to the gas guage when I had it onthe bench and was able to get movement. I used a 9 volt battery and the guagemoved to around 1/2 tank. I then reversed the polarity and the guage went backto E. So with that said I kinda assumed the guages were o k. I reallyappriciate your efforts, Keep pitching maby eventually I'll get a hit. ThanksBob
----- Original Message -----
From: "Dan Solomon" <dansolomon at msn.com>
To: "Chevelle List" <chevelle-list at 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 thegauges work before you made your changes? The reason I ask is that the pins arein different locations at the firewall. If one harness is from a 70 and onefrom a 71-72 that may cause your problem.
Thanks, Dan
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From: rml438 at comcast.net 

Date: Mon, 1 Feb 2010 21:54:45 +0000 (UTC)

To: <dansolomon at msn.com>; The ChevelleMailing List<chevelle-list at chevelles.net>

Subject: Re: [Chevelle-list] wiring question

Dan, Idid ground the cluster with one of the screws that attach the metal to theplastic housing. And all my lights are working, dash lights, head lights, butnone of my guages are working. Fuel, temp, or amp. All of my fuses are good.Any ideas. Thanks Bob  
----- Original Message -----
From: "Dan Solomon" <dansolomon at msn.com>
To: "Chevelle List" <chevelle-list at 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 needground to the cluster. Use one of the screws that attach the metal cover to theplastic 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: rml438 at comcast.net 

Date: Mon, 1 Feb 2010 20:56:09 +0000 (UTC)

To: The Chevelle MailingList<chevelle-list at 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 guagecluster itself. can that go on any screw on the back of the cluster. All thescrews on the back go through the pcb.
----- Original Message -----
From: "Dan Solomon" <dansolomon at msn.com>
To: "The Chevelle Mailing List" <chevelle-list at 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 pulledit out and put it back in 6 times. Make sure that you have the three blackground wires hooked up. One goes to a screw on the cluster, one tothe metal frame of the dash carrier and one to the e-brake. Also didyou put the ground strap back in under the light switch?

My problem turned out to be the headlight switch. Power to the cluster passesthrough this switch. One of the spades slipped out aside the connector andwas not making contact. Here is the topic on chevelles.com. It has somegreat pics and information to diagnose the headlight switch. It alsoincludes information on the 12 pin connector and tests to verify voltageat the fusebox. [http://www.chevelles.com/forums/showthread.php?t=260728&highlight=hot+wires+SS+dash] 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 ahurry."
[http://www.freewebs.com/chevelles1970/] http://www.freewebs.com/chevelles1970/

Date: Mon, 1 Feb 2010 10:06:28 +0000
From: rml438 at comcast.net
To: Chevelle-list at chevelles.net
Subject: [Chevelle-list] wiring question

I setmy restored dash in place and connected the wires, turned the key to acess. andmy temp. fuel, and amp guages did nothing. Should there be a voltage at the 12point plug for each of these three guages. My dash lights work. Turn signalswork. brake lights. All the lights are working. Iam stumped. Any ideas,Thanks.Frustrated.
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