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

FBIRD69's 1969 Firebird

2024 March
of the Month

  • Rev up your passion for Pontiacs and join our vibrant community of enthusiasts!

    Whether you're a die-hard fan of classic muscle cars or you've got a soft spot for sleek modern models, you've found your home here at Forever Pontiac. Our community is dedicated to celebrating everything Pontiac, from the iconic GTO to the legendary Firebird and everything in between.

    Unlock access to expert advice, stunning photo galleries, engaging discussions, exclusive events, and more!

    Start your Pontiac journey with us today!

    Sign up now! 🏁

Wiring harness


Recommended Posts

I have a 1967 GTO that has a problem with the wiring harness. Some times I have to play with the connection on the firewall to get thing to function (lights, starter etc.) any ideas on how to fix without replacing wiring harness?

Link to comment
Share on other sites

Tired of these Ads? Register Today!

Well, the obvious answer is to unbolt it and look to see exactly why it's doing that. I'd disconnect the battery first. It could be corrosion, or it could be loose connectors.

 

That said ... you're talking about issues with a wiring set with half a century under it's belt. A relatively inexpensive and easy to replace wire set. I wouldn't blind myself to just replacing it if what you find warrants it. If you've one problem today .. you'll have another tomorrow. A fresh harness (when necessary) is simply common sense to have a reliable ride. I file this with driving on 20 year old tires. Wiring might not fall under normal consumables for a car, but they definitely do have a best before date.

Link to comment
Share on other sites

The fact that you have to fiddle with the wiring harness connection on the firewall tells me that it is probably loose at least and moisture has probably gotten into it  and corrosion may have started at worst. So disconnecting and inspecting it is the logic first step. If replacing it, as Pro suggest (and I agree with him), warrants it it will be a real peace of mind. You should also consider the state of the rest of the wiring in the car. If the wiring under the dash is hacked up or spliced in places, perhaps it is best to completely re-wire the car with a new harness - perhaps with new blade fuses too. A new harness may set you back $500-600 but it sure beats leaving you stranded somewhere or worse, burning your car to the ground.

Since I didn't directly answer your question, you might try tightening the harness connector screws once you are sure you have eliminated or insured there is no moisture getting into the contacts. I believe there are two screws/nuts used to bolt the 2 halfs of the bulk head connectors together between the firewall.

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.