Pontiac Grand Prix 2000 Tail lights
Tail lights work, turn signals work, no brake lights... 3rd brake light in the
window is fine, fuses are good, brake switch is good....ran wire from 3rd brake
light to tail brakes lights and now have a weak signal...know its in the wiring
harness but cant find anywhere to buy the harness
Sounds like a bad turn signal switch. The turn signal switch also handles the brake lights, it cuts off the brake light on the side the switch is turned to, so when the turn signal switch is in the center position it allows the power from the brake switch through the it and to the rear brake lights. The third eye light is directly wired to the brake light switch so it is not handled by the turn signal switch.
Sounds about right. I feel you still need a harness try partsgeek.com
Sorry my computer is messing up I don't feel you still need a harness what I'm trying to say is if you need a harness try parts geek
Looking for a Used Grand Prix in your area?
CarGurus has 2,449 nationwide Grand Prix listings starting at $950.
Get More Money for Your CarBe seen by 20 million shoppers. Create Your Free Listing
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts