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1979 Fuse-Guage Blowing - Help!

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Old 05-22-2018, 10:21 AM
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Wolfman1979
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Default 1979 Fuse-Guage Blowing - Help!

I know this may be a long shot, but maybe someone with some diagrams or extensive wiring knowledge may help. When I turn on the ignition, the "T" fuse which is 20A blows. From what I can tell, it is the Guages fuse. This car has custom Phantom Guages so not sure what this fuse looks at particularly. When I pulled the fuse, the right side of the connection in the fuse block measured 660 ohms to GND and the left side measure 0 ohms to GND, which I assume is the shorted side. My question is, where does the wire on the left side go and what may be the color? If somehow I can find that, then maybe I could trace the problem down.

thanks for any help.
Old 05-22-2018, 10:34 AM
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DUB
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I do not know of any fuse that is labeled "T" as you wrote.

You need to post a GOOD CLEAR photo of the fuse panel and show what fuse is popping on you.

DUB
Old 05-22-2018, 11:51 AM
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Originally Posted by DUB
I do not know of any fuse that is labeled "T" as you wrote.

You need to post a GOOD CLEAR photo of the fuse panel and show what fuse is popping on you.

DUB
The fuse that is blowing has a yellow circle around it.

thanks!
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Old 05-22-2018, 12:20 PM
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carriljc
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See here: Looks like "T" goes to "fuse-gauges"

http://repairs.willcoxcorvette.com/1...te-fuse-panel/
Old 05-22-2018, 02:06 PM
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Peterbuilt
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Depending on the year of your Corvette the GAUGES fuse protects several circuits.
You have to isolate each circuit to find the short.

Go back to the last thing that you adjusted or worked on as that might give you a clue.


https://docs.google.com/viewer?a=v&p...TYyNWViMWY1NzY
Old 05-22-2018, 02:44 PM
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The wiring diagram I have is completely different than the one in link above. Not even remotely the same.

DUB
Old 05-22-2018, 03:05 PM
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Hi Dub,
That schematic was found on the internet so let's go by the one that you have.
Pete.
Old 05-22-2018, 03:18 PM
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Originally Posted by Peterbuilt
Hi Dub,
That schematic was found on the internet so let's go by the one that you have.
Pete.
From what little research I have been able to find is that the wire that comes off of the "T" or guages fuse is a PNK/BLK or Pink with Black stripe, but not sure if that is the only wire. Could be others bussed in on the fuse block.
Old 05-22-2018, 06:02 PM
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0Willcox Corvette
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Not sure about the gauges you have, but I'd take a hard look at the pcb behind the center dash cluster. It's common for the fingers on this pcb to become un-laminated and possibly touch another circuit causing the short.



Here is a factory wiring schematic for the 1979 cars.

http://repairs.willcoxcorvette.com/w...re-diagram.png
Old 05-22-2018, 06:56 PM
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Originally Posted by Peterbuilt
Hi Dub,
That schematic was found on the internet so let's go by the one that you have.
Pete.
Pete,
I knew you found it on the internet. I was just letting the OP know not to use it due to it is not correct.

DUB
Old 05-22-2018, 07:31 PM
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Originally Posted by Willcox Corvette
Not sure about the gauges you have, but I'd take a hard look at the pcb behind the center dash cluster. It's common for the fingers on this pcb to become un-laminated and possibly touch another circuit causing the short.



Here is a factory wiring schematic for the 1979 cars.

http://repairs.willcoxcorvette.com/w...re-diagram.png
Many thanks on the schematic link. I'm sure this will help. This car has custom guages and the printed circuit has been removed. Just need to trace the wiring from the fuse block fuse socket to see where it all goes.
Old 05-24-2018, 05:32 PM
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Problem solved: The line to the oil pressure guage was leaking a little and got into the radio and wiring for the guages. What a mess, but wiring needed to be cleaned up anyway and refitted the oil pressure line. I really don't like those compression fittings at all.

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