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ALL, can a single gage cause problems with the other gages> ie, can a problem with my voltmeter cause issue with the Temp gage and the oil pressure gage. I am having issue with all three.
Answer, no.
Check ground for guage cluster. Check the printed circuit board on the guage cluster.
But one guage does not affect the others.
What is in common? Power to and ground from are common.
ALL, can a single gage cause problems with the other gages> ie, can a problem with my voltmeter cause issue with the Temp gage and the oil pressure gage. I am having issue with all three.
What year do you have????
77-82's have a printed circuit on the back of the center cluster, which can get brittle and break with age. If your car falls within those years, I suspect it's a bad printed circuit.
68-73 Corvettes have a mechanical gauge, so it's really impossible for a 68-73 oil gauge to be effected by an electrical issue with another gauge. 74-76's have an electric oil gauge, but they are separately wired from the other gauges. Other than something like a ground issue, I can't imagine an electrical issue with one gauge, would effect two other gauges in a 74-76 Corvette center cluster.
You "Think" you purchased it on ebay. Do you still have the original? Perhaps give that a try?
Run a ground wire direct to the steel birdcage directly behind the guage cluster. Drill a hole and run in a self tapper if nessesary. The factory ground is on the driver's side A piller. Just high enough its behind the left side dash assembly.
My car is 2 years older, I just completed a gauge cluster overhaul. My printed circuit was just fine and I am still running it.
Your gauges lighting and center cluster ground come from the same source as pointed out above.
77-79 used the same PCB wiring but wire colors did changed a little between the years.
If you look at the 12 pin connector you will see 2 black wires one at pin 1 and one at pin 9.
The connector pins (cells) are numbered...
The ground at pin 1 is your primary case ground.
Pin 9 is low fuel warning and fuel gauge ground circuit only.
Check continuity at pin 1 to center cluster metal case.
I am no electrician, but I just did ohms check and found that if I touch the red (+) probe to the power stud on the clock and the black (-) to the metal case it beeps. which, I would think there is a short to ground?????
Please correct me if I am wrong. they clock works but it runs fast.
I am no electrician, but I just did ohms check and found that if I touch the red (+) probe to the power stud on the clock and the black (-) to the metal case it beeps. which, I would think there is a short to ground?????
Please correct me if I am wrong. they clock works but it runs fast.
This is why you got a beep when you touched one probe to the power stud and the other probe to the clocks case when your meter was in the ohms setting...
Your clock requires a positive (clock stud) and a negative (clock case) to run...
You are just seeing a natural circuit path doing the test you did at the clock...
Now about your clock running fast...
Do this once a day for the next several days...
Pull the **** out and turn your clock hands counterclockwise 12 hours, see if this solves your runs fast issue...
When you start seeing improvements let it run a few days without doing the counter 12 hour reset...
If the clock is running slow you would turn the clock hands clockwise...
Center Instrument cluster
