73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Electrical => Topic started by: ken4444 on May 17, 2018, 06:44:24 pm

Title: Diagram for firewall connector?
Post by: ken4444 on May 17, 2018, 06:44:24 pm

Does anyone have a diagram that shows what each terminal on the firewall connector is used for?  I need to find the gas tank sender wire on this:

(https://imgur.com/vQj6WQ0.jpg)

Title: Re: Diagram for firewall connector?
Post by: VileZambonie on May 17, 2018, 07:11:01 pm

http://forum.73-87chevytrucks.com/smforum/index.php?topic=5220.0

Title: Re: Diagram for firewall connector?
Post by: VileZambonie on May 17, 2018, 07:30:29 pm

I'm also going to assume it's the 88 suburban wiring harness?

Title: Re: Diagram for firewall connector?
Post by: VileZambonie on May 17, 2018, 07:31:29 pm

Click the attachment for full size

Title: Re: Diagram for firewall connector?
Post by: ken4444 on May 17, 2018, 08:04:15 pm

Quote from: VileZambonie on May 17, 2018, 07:30:29 pm

I'm also going to assume it's the 88 suburban wiring harness?

thanks very much!  I apologize for leaving out the model and year :)

Yes, I believe this is an '88 suburban wiring harness, and I assume that includes the bulkhead connector!

Title: Re: Diagram for firewall connector?
Post by: Snowball on May 26, 2026, 04:28:30 pm

I’m looking for the same diagram as the original poster for a 1979 Chevrolet C 10 no AC gasoline two tanks as it looks like somebody cut some wires underneath the hood and I’m trying to fix my accessory wires and constant 12 V wires any diagrams, numbering labeling on pin outs would be highly appreciated