Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello, my name is***** it the hi beams or low beams that come on?
I'm assuming you tried to replace relay? Thanks.
Does unplugging the BCM shut off the lights?
The body control module activates the relay and relay sends power to the lights. Since removing relay shuts off lights that would mean possible problems are relay, wiring, or BCM. Since BCM and relay have been replaced that would leave problem as wiring. There is a pink/white wire that goes from fuse box to body control module, if this wire is grounding out it will activate the relay. I'd probably run a new wire at this point since everything else has been done. Here is a wiring diagram so you can see how system works. Let me know how it goes or if you have more questions. Thanks.
No problem, let me know how it turns out or if you run into questions. You can reply to this answer at any time without additional fees. Thanks again and have a good night.