I have a 1997 Buick Park Avenue and when I flip the switch to turn my high beams on, they don’t come on. And my dash lights and side marker lights go off also. I have replaced the switch with a new one and it didn’t fix it.
RESPONSE
Looking at the wiring diagram it would appear as the only thing in common with both the high beam switch and the dash lights would be the Lamp Control Module other than the switch.