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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
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
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.
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.
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
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.
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.
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....
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