I have a 2003 Chevy Tahoe LTZ. My left turn signal completely stopped working in the front, rear, mirror and the instrument cluster, even with the hazard lights. I’ve already checked the bulb connections and the fuses and nothing is wrong. I do have aftermarket LED lower headlights on it but the right side works fine so I don’t see that being the problem. Considering the fuse isn’t blown I wouldn’t think it wouldn’t be a bad ground right? I NEED HELP!!!!

 

maybe a bad turn signal switch. each bulb has its own ground so its unlikely that grounds for the front , rear, mirror and cluster has all gone bad at once. check for power out of the switch.

 

how could I check to see if it happens to be a faulty switch?

 

Replace the bulb first.

 

or



Plus electrical schematics



and some know-how

https://www.fluke.com/en-ca/learn/bl...roubleshooting

 

that’s already been done.