Hood ajar light keeps coming on when it rains or I go through a car wash. I have changed the hood latch and cable. So what could it be?
The switch is out of adjustment or defective or the moisture is getting into the switch. I would replace it.
Where is the switch at?
It's a microswich located on the door latch. Sounds like you have an exposed wire inside the door that is getting wet and completing the circuit to ground. This will also cause the interior lights to come on and stay on. HTH. -Jim
The hood switch is in the door? That seems odd.
Looking for a Used Grand Prix in your area?
CarGurus has 2,751 nationwide Grand Prix listings starting at $1,200.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts