1977 Printed circuit board

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Mar 31, 2015 | 11:51 AM

Jayson77

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From: Carlyle IL

1977 Printed circuit board

Are there nuts between the resistors and the printed circuit?

Are there any other insulators besides the phenolic washers on the water temp posts?

Is the metal bezel grounded?

Im having a problem with all my gauges. They all have power but no signal. Ive verified all the grounds and sending wires at the rear connector. Any thoughts? Thanks guys.

Last edited by Jayson77; Mar 31, 2015 at 07:40 PM.

Mar 31, 2015 | 07:38 PM

Jayson77

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From: Carlyle IL

This is what they look like when the engine is running.

Does everything look correct here, minus the printed circut?<br/>

Mar 31, 2015 | 07:55 PM

mds3013

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I realize this is not a direct answer but have you ever looked through here?

http://willcoxcorvette.com/repairand...34adb6b7640519

Ernie at Willcox will know the answer. Good luck with it. mike...

Mar 31, 2015 | 08:32 PM

Jayson77

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From: Carlyle IL

Quote:

Originally Posted by mds3013

I realize this is not a direct answer but have you ever looked through here?

http://willcoxcorvette.com/repairand...34adb6b7640519

Ernie at Willcox will know the answer.
Good luck with it. mike...

The Willcox site is actually how I figured out that I am missing all signal wires. Im trying to figure out what the all have in common to make them all have the same malfunction. Everything checks good at the rear connector, that's why I think I have missed something in the bezel.

Mar 31, 2015 | 11:57 PM

BHRIG

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From: Cherry Hill N.J.

Are the gauges grounded?

You could have a bad connector at the plug from the harness.

Make sure ALL contacts are making contact.

Hope this helps.

Apr 3, 2015 | 12:59 PM

Jayson77

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From: Carlyle IL

Quote:

Originally Posted by BHRIG

Are the gauges grounded?

You could have a bad connector at the plug from the harness.

Make sure ALL contacts are making contact.

Hope this helps.

You were right! The connector wasn't touching all the spots on the printed circuit. I adjusted the pegs on the connector so theyre touching. My Volts and Water Temp both work perfectly. The fuel gauge and the oil still are showing the same.

Is there a trick to removing the fuel level sendign unit wire from the post on top of the tank? I'd like to ohm the wire from the post to the gauge. Thanks guys.

Apr 4, 2015 | 06:07 PM

Jayson77

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From: Carlyle IL

I figured out that when I grounded the metal bezel my oil pressure guage and lights work. I temporarily grounded it using a jumper with alligator clips.

I realize the additional ground isnt from the factory.

Anyone have a clue what the problem is?

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