My Headlights arent working
I replaced the bulbs and the fuses on my truck my headlights still aren't working what is the problem?
The switch that turns the lights on is the problem had same problem
the switch on the inside of the truck?
This is one of the most common problems on TB's and Envoys. There's actually a recall for it. Swap relay #43 with #46 (under the hood), do you have lights now? Buy a new headlight relay and keep a spare one with you.
This is #43
This is #46
Must have got the #'s wrong, many apologies. It's these 2, same exact relay, 1 is the headlight relay, the other is for the fan.
The problem is an overvoltage issue on the side that goes out. I am still troubleshooting the issue on my 2004 Trailblazer. I did put a heavy duty relay which helped for about 5 months now, but my light is out yet again.
Ectkr, why don't you go to the dealer for the recall? I'm told they finally have a permanent fix.
