2000 grand prix the brake lights work but the third light is not coming on ?
Check voltage at the bulb socket, it might be disconnected somewhere or a burnt socket
is there a fuse for the third light alone or no?
I belive it is because the other lights go through ur turn signal switch but not 100% sure. Check all the fuses and we'll all find out
The third brake light is wired directly to the brake light switch. It bypasses the turn signal switch. Check the brake light switch. If that's ok, check the sockets for the bulbs. You should have bulb number 1141 in there. HTH. - Jim
Looking for a Used Grand Prix in your area?
CarGurus has 2,418 nationwide Grand Prix listings starting at $1,900.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts