Overdrive relay
Thread Starter
Heel & Toe
Joined: Jul 2020
Posts: 19
Likes: 9
From: Staunton VA
Overdrive relay
I bought a 1985 Corvette with the DN 4+3 about a month ago as a project, and I've been working my way through all the issues that came with it. One of the problems giving me special trouble is the overdrive relay - PO cut out the existing relay and bought a new one, but failed to provide any information as to the wiring order of the new one. Essentially, I have a bundle of wires that should go to the overdrive relay, and a new relay, with no way of knowing how they are all connected. Some of the wires are similarly colored, which will make this step especially interesting. I was hoping the good folks on this forum might either have a picture of their relay wired correctly, or better yet a wiring diagram that I could work backwards from to identify the pinouts for the relay. Thanks!
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
Relay
GM changed to the new relays and connectors in late 88.
find someone who has an 89 or 90 With a factory service manual for the wiring of those relays
find someone who has an 89 or 90 With a factory service manual for the wiring of those relays
