Jump to content
Forums Gone... but not forgotten!
Pontiac of the Month

PONTIAZI's 1987 Firebird Trans Am GTA

2023 September
of the Month

  • Welcome!

    Welcome to Forever Pontiac, where we keep the memory of Pontiac alive with great discussion, maintenance tips, restoration/modification progression "blogs" and help from professional & DIY mechanics. Also, wonderful competitions that occur regularly. Please register for an absolutely free account to join in!

69 rally gauges not working - where do I start

Recommended Posts

So I got this great 69 custom S off of ebay... rebuilt motor/trans, suspension done, new radiator, new everything really..... guy was great at mechanical. Then there is the electrical.... 

He was not so great at that. The tach that was in it was the wrong one... and he had a replacement for me which I switched out and it works great. The rally gauge cluster however.... does not. Its the one that has the gauge for temp, oil, and fuel, with the gen light at the bottom. I pulled the entire dash apart and made sure the circuit board (new) was on there correctly and all tight, the ground points were all attached and tight, and even added a few ground wires just in case. The tach and the speedo work fine.... but the last cluster does not work at all. I see the oil pressure move a little but everything else pegs out and stays there (car off or on). 


I would like to bench test this but do not know how to do so. If anyone knows the proper way to test I am all ears. I have a meter and plenty of resistors or a dc variable voltage power supply I can use to test. 

I really like how this gauge looks and dont really want to get a repop... any advise is welcomed. Thanks. 


Looks like the picture attached.


Link to comment
Share on other sites

  • 3 weeks later...

Tired of these Ads? Register Today!

Solved!!!! I'm going to start another post telling what I found out and how to get your rally gauges going.

Link to comment
Share on other sites

I had the same thing with my oil pressure, pegged out. Thought it was the oil sending unit but no, I found a wire going thru the firewall grounded out.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Tired of these Ads? Purchase Enhanced Membership today to remove them!
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.