- Buick Ownership
- 1999 Buick Park Avenue Ultra (Supercharged)
Yeah I’m not seeing your issue here
Is this your oe route?
what I’m saying is you are way better off with a new harness an peeling off barely cured if cured fully vinyl tape and conduit and routing in a more series ii way If you want to skip that mess just verify it stays secured out of the way. Even if you use your other wiring to extend the new harness and make it like your old one you’d be a hell of a lot further ahead than trying to use your oe one
the pcm runs its ground to the icm and if your car has a bunch of codes for random things, I’d bet your harnsss broke that g111 in the diagram and the pcm no longer had a ground reference