Souds like an intermittent short, you will need to trace the wire back to the stop light switch.

Answered by merlin2021 (expert)
18,145 answers provided

I have a very similar problem the third brake light works fine. the bottom two don't. I checked the bulbs they seem to look good (the filaments). I know that the trunk was replaced and that the wires were left disconnected. I tried to splice them back together but that didn't fix it. I looked at the fuses all of the transparent ones are good. the plastic gray ones I dont know. anyways, I wanted to know if there was anything else I could test or what to test or any other suggestions

Answered by monte_98
0 questions asked

We just fixed the same problem and dont ask why but gm runs the brake lights thru the turn signal we replaced the turn signal switch and no more problems was not easy but the part was 60.00 at auto zone

Answered by jlb9929
0 questions asked