Mark Fav

I have a '02, everything stock. I'm having the issue of the middle brake light working and the other 4 do not. The turn signals and hazard lights work correctly. All functions of the MFS work correctly. I replaced the hazard flasher about a year and a half ago (pain) when I was having an issue with the turn signals. That fixed the issue and all has been well since. I'm reading conflicting information on the forum that the problem could lie in the muti-function switch. Some say that if you look at the circuit diagram, if the hazard flashers are working correctly that it cannot be a problem with the MFS. I can run a multi-meter, but cannot judge the truth in that statement. I'm kinda stuck and am not sure how to progress in identifying the issue. Would removing the hazard flasher (pain) and jumping the white wire (pin 17) to the brown wire (pin 27) in the wiring harness connector to the hazard switch be the first thing I should try? Also, is there a brake light ground somewhere in the rear that could be the culprit? Seems unlikely as the hazards work. Thanks in advance for any help you can lend me.
Best,
Mark

Mark Fav

I found the diagrams, just not sure how to proceed.

Mark Fav

OK. Of course I pulled fuse 8 to make sure it was ok and it was good. Was hoping to not have to pull the hazard switch, but that looks like the next logical thing to do, thx.

Mark Fav

OK, taking it apart today, I'll post my results. Thanks!

Mark Fav

It was the hazard switch. Brand new GM switch lasted one year, very disappointing. Thanks for the help!