I have a 2002 Avalanche & the low beam headlights won't work! I have replaced the switch ($350.00) & the relay & all the fuses are good. The wiring seems to be in the right place & no "shorts". I have run out of ideas-(also $$$ is now low at this point!) I am a woman, but can't think of anything else! :frown:
Any other have any ideas? Please help! Thank you. (PS: I also replaced both of the bulbs too; so, they are good ones & not the source of this trouble!)

Did you replace the dimmer switch or the head light switch?

Remember the dimmer switch is a ground circuit.
It grounds the low beam lights to turn them on.
Make sure it is switching ground.

Some after market switches will not work right.
MT