1993 Pontiac Firebird with vibrating headlamp and alarm system that won't shut off.
My grandmother's Firebird has been acting strange lately, the headlamp on driver's side is going up and down and making a buzzing sound. Also, the car will not start and the alarm is on constantly (will not disarm unless we unhook the battery).
We've done everything recommended in the owner's manual, does anyone have an idea of what the malfunction or malfunctions could be?