C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Jun 14, 2012 | 09:46 PM
  #1  
Mikeylikesit79's Avatar
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I replaced my PCB hoping to restore my guages while the temp guage now seems to be working the others that worked before, Battery, clock etc now have stopped working??any ideas
also the low fuel light is on and the tank is full??
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Old Jun 14, 2012 | 11:08 PM
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1986coupe
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Did you connect everything properly? Is there a ground wire loose or not connected?
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Old Jun 15, 2012 | 07:50 AM
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I believe that i did reconnect everything i dont see a ground wire only a harness plug that plugs everything in from the back....ill check it again, thanks!
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Old Jun 15, 2012 | 07:56 AM
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Originally Posted by Mikeylikesit79
I believe that i did reconnect everything i dont see a ground wire only a harness plug that plugs everything in from the back....ill check it again, thanks!
Check the tiny brass contacts on the new PCB to make sure one is not folded over. The harness plug connection is real touchy.
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Old Aug 14, 2012 | 06:01 PM
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Originally Posted by Mikeylikesit79
I replaced my PCB hoping to restore my guages while the temp guage now seems to be working the others that worked before, Battery, clock etc now have stopped working??any ideas
also the low fuel light is on and the tank is full??
Some have been able to clean this by disconnecting the negative battery cable for 10 minutes. It would suggest that your in tank solenoid has closed to protect from a diagnostic fault or the the solenoid itself has failed to open when energized (turning the key on).

pcb assembly house

Last edited by davejo; Dec 6, 2019 at 05:51 PM.
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Old Aug 14, 2012 | 06:15 PM
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Originally Posted by Mikeylikesit79
I replaced my PCB hoping to restore my guages while the temp guage now seems to be working the others that worked before, Battery, clock etc now have stopped working??any ideas
also the low fuel light is on and the tank is full??
Did you replace the low fuel light with a bulb + socket?

It requires a special module and socket that triggers low fuel when resistance of the sender wire drops below a certain level.

This is what it all should look like. (aftermarket repro PCB, the original is more of a clear green and more flexible material)

Low fuel module in upper left corner.
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Old Aug 14, 2012 | 06:17 PM
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Originally Posted by ...Roger...
Check the tiny brass contacts on the new PCB to make sure one is not folded over. The harness plug connection is real touchy.
VERY touchy. Those little tabs get bent over in short order.

Adam
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Old Aug 23, 2012 | 01:22 AM
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do they offer pcb fabrication in low volume ?


pcb components

Last edited by David23Kipp; Nov 22, 2013 at 10:52 AM.
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Old Jun 27, 2013 | 07:41 AM
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Hi this pcb picture is very nice wonderful.
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Old Jun 27, 2013 | 10:45 AM
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From: St. Jacob IL
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This is a great thread. I have a nonfunctioning tach (surprise surprise) and oil pressure gauge (more worrisome). Has anybody tried to point to point wire the instrumentation in one of these cars? If so, how difficult is it? I am decent with a soldering iron.
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Old Apr 29, 2014 | 06:57 AM
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I think you should place order for your required PCB at pcbmaking.com and I m sure you will get your job done quickly on affordable price. It provides professional PCB with Free shipping and big discount price. Good luck!
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