I would greatly appreciate any input on this issues I've been having with my 04 Blazer. My left and right brake lights are not working, but the third brake light works fine. The running lights work, turn signals and hazard lights work, I replaced the bulbs, checked the fuses and everything looks fine. The only thing I can think of is that it's the turn signal switch. Any thoughts or suggestion?

 

The stop lamp switch on the brake pedal support has an orange wire going in, and two white wires coming out. The orange wire must show battery voltage at all times. The two white wires must show battery voltage when the brake pedal is applied. Post your results.


p16

 

If the tail light assembly is like Chevy trucks it might be the circuit board in the light assembly, replace the whole tail light