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help bubbas work got me in a bind

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Old Jul 6, 2007 | 01:10 PM
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Default help bubbas work got me in a bind

had the console and upper dash out to repair bubbas work.

got it all together but upon starting the car the gas gauge goes to the 4 oclock position.

no heater controls blower -A/C compressor doesnt kick in.

wipers didnt work either.
seat belt warning lite didnt come on aswell.

I checked the relay for the blower and the connector got a bit melted but it has been working.

damn now ill need a wiring diagaram to straighten this out.

hoping you guys had a simple fix I overlooked.

btw car starts fine.
and there is 1 ground wire spade that goes into a connector with 2 black wires that I cant find where it goes?

Last edited by rabiddawg; Jul 6, 2007 at 01:16 PM.
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Old Jul 6, 2007 | 01:14 PM
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What year?
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Old Jul 6, 2007 | 01:15 PM
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1969
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Old Jul 6, 2007 | 01:29 PM
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Sorry, I don't have schematics for that year. SOmeone will pipe in that does. I highly recommend getting a good shop manual for the specific year. Good Info in there. Doc Rebuild and one of the members in here Don Oleson make good color laminated diagrams. I have Dons, its a good one
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Old Jul 6, 2007 | 01:33 PM
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yeah thks for the help
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Old Jul 6, 2007 | 03:32 PM
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yeah i got the blower to work and the A/C



still gas gauge is pegged at 4 oclock

no interior instrument lights.

no wipers (door etc doesnt work.)

yes i had the battery disconnected all the time except when I wanted to try the blower and A/C with the center dash gauge panel just hanging.

the 2 wire spade is located near the shifter still cant find the connector it belongs to.

more i think about it It does sound like a fuseable link.

but which one ?
engine is running a bit rough now too.
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Old Jul 6, 2007 | 04:01 PM
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here is a pic of bubbas rats nest

what is that black relay for? (just under the radio delete panel)

there is 2 more on the left aswell
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Old Jul 6, 2007 | 06:59 PM
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Sounds like the gauge panel isn't grounded. Try running a separate ground wire from the metal panel on the back of the gauge cluster to a known ground.
The black relay is the windshield wiper relay, and the metal piece it's attatched to should be grounded also
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Old Jul 6, 2007 | 07:18 PM
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you could be right though I did a ground check with my meter but they do work loose.
man glad I been working on my camaro this long cuz If I had a vette with all its hokey wiring and vacum it would have been sold long ago lol.
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Old Jul 8, 2007 | 07:25 AM
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thks a whole lot for the help guys!
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Old Jul 8, 2007 | 12:04 PM
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What turned out to be the problem? Was it a grounding issue?
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Old Jul 8, 2007 | 06:31 PM
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no didnt work on it this weekend due to my weekend at the drags.
but its not a ground issue with the panel.
But I did remember bubba had that spade terminal with 2 black wires which read to ground taped up to a wire that had 12volts on it in the on position of the ignition.
which might be the return path to ground for all the problems.
I said thks sarcatically cuz your the only one that has helped 682XLR8.
ment for the other C-3 guys lol.
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Old Jul 8, 2007 | 07:40 PM
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looking into getting DOC vettes oh so ez wiring diagram
http://docrebuild.com/oosoez.html
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Old Jul 8, 2007 | 11:01 PM
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We cool

I've had similar grounding problems with my gauge panel and shifter plate, and had to run my own ground wires. And this is with a new harness!
I saw that link to the Doc's wiring diagram, it shows everything but the brand of wire used I should get one for myself, might show if I missed anything
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Old Jul 9, 2007 | 06:42 PM
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since doc rebuild is only 30 to 40 miles away ill drive down and save the shipping lol.
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Old Jul 9, 2007 | 07:19 PM
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its the summer of 07, wheres the 78 diagram =\
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Old Jul 14, 2007 | 12:07 PM
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ok I got the heater/AC working now

and interior instrument lights aswell as the wipers.
wiring is now to the print. bubba has screwed it all up before.
only thing that still isnt working is the fuel gauge.
still pegged to 4 oclock position.
even after filling the tank to see if it moves but it didnt.
one thing I did notice is the clock has 1 terminal and a 12 volt power wire is attatched aswell as a black wire going to the gage cluster metal backing plate?
this cant be right?
the metal backing plate ohms to ground.
the wiring diagram doesnt specify whats hooked up to the clock.
pls help.
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To help bubbas work got me in a bind

Old Jul 14, 2007 | 12:35 PM
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for the gas gauge:
There should be 2 wires connected to the sender unit, signal and ground. The ground should be connected to a tab on the the sender unit and the signal to the pin. Disconnect them both and connect together, that will peg the meter to full if the path and the gauge are good. If it does anything the path is good and the gauge is a maybe. if it does nothing, ohm the ground wire to ground, should be dead short. Then check for 12v on the signal wire.
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Old Jul 14, 2007 | 12:46 PM
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Originally Posted by SIXFOOTER
for the gas gauge:
There should be 2 wires connected to the sender unit, signal and ground. The ground should be connected to a tab on the the sender unit and the signal to the pin. Disconnect them both and connect together, that will peg the meter to full if the path and the gauge are good. If it does anything the path is good and the gauge is a maybe. if it does nothing, ohm the ground wire to ground, should be dead short. Then check for 12v on the signal wire.

Beeep, sorry man, signal and pink +12 volts to the fuel gauge...it's own two wire plug, NOT ground...ground is at the tank, and supposed to be electrically same/damn close as the ground in the birdcage.... the rest of your post is correct....

confusing otherwise to ME, anyway when I read it....

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Old Jul 14, 2007 | 12:59 PM
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Gene, with the signal wire disconnected from the sensor a voltmeter will read very near 12v at the sensor end of the wire. Open circuit there is no current therefore no voltage drop, so you woud read source voltage. With the signal wire and ground wire connected normally you would only read partial voltage depending on fuel level, ...if it works
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