Hello All,

I am new to the site and I have seen a few diagrams of the under dash wiring but can't seem to find a decent color coded one. Does anyone have a wire diagram for the under dash wire harnesses for 1970 Cutlass Supreme? Sorry if there is a forum already dedicated to this. If so, could someone please direct me to the correct post? Just got a deal on a 1970 Cutlass Supreme working on a full restore.

Thanks in advance!

- Joco

 

There's probably a wiring diagram someplace on our website. Check the related threads below and do a search. 👇

Also, make sure you buy a print copy of the Factory and Chassis Service Manuals for your Oldsmobile. Especially if you want to do your own service.

 

 

Thank you both! I have order the repair guide just waiting in it. That is the exact wiring diagram I was looking for!

 

Is your diagram laminated.

Thank you.

 

I have two 1970 wiring diagrams - both are digital format. I downloaded the above wiring diagram from this site (CO) 02/25/2020. The image was captured via a Samsung camera in flash mode. The other image I have was captured w/o flash mode. It was also downloaded from this site (CO).

 

Identical camera - no flash mode.

 

 

Awesome! You the man Chief!