headlight bouncing
why is there a "noise" when you lock/unlock the doors, when the headlights are turned on/off , or why do my headlights come up when I just turn on my park/fog lights.
The headlights on the Trans Am/Formula/Firebird measures amperage (resistence) to know when the headlight is fully up and fully down. When a plastic gear in the headlight motor gets stripped the system keeps powering the motors and thats why you hear a jackhammer/grinding type noise when you lock/unlock the doors or when you turn on/off the headlights.
There are two options to solve the problem.The first is the 180 temp fix, this when you rotate the gear in the motor to the unused portion. The gear in the motor only uses half of a side to raise/lower the lights, so you have another half of the gear that has never been used. The second is to replace the plastic gear that has worn out with a brass gear.






