2000 grand prix the brake lights work but the third light is not coming on ?
I replaced the bulbs in the third light is not coming on with the regular brake light bulbs
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