Hello. I'm attaching the wiring diagrams for that car in the images below. They are possible the most convoluted and confusing diagrams I've seen in awhile, but it sounds like you'll be able to pick your way through it.
In my experience, this type of wiring issue is usually at the connector or within 6 inches of it. So I'd inspect that connector closely for weakness or corrosion.
Images (Click to enlarge)
Friday, May 21st, 2021 AT 11:57 AM