Why are the headlights on my trailblazer not working?
Why are the headlights on my trailblazer not working?
This 2004 Chevrolet Trailblazer came in with the complaint that neither one of the low beam headlights would work. They both stopped working at the same time. The customer had already paid another shop to have the headlight and dimmer switches replaced. After several days of trying hit and miss diagnosis she called me.
What to do if there are no headlights or low beam lights?
So this is a an aggravating issue! No headlights or low beam lights but the high beams do work? This can be an easy fix. Replacing the HDM or headlight driver module is a common solution and easy to install. These cost about 30.00 off of Amazon or at your friendly local auto parts store.
Where is Terminal 4 on a low beam headlight?
Terminal #4 is the relay output terminal to the low beam headlight fuses #3 & #6. Terminal #5 is switch battery power from the BCM. I do not recommend testing this terminal with a test light. Terminal #6 is continuous battery ground and is terminated at the lower left side of the engine.
Why are the low beams on my truck not working?
My low beams suddenly stopped working. All the fuses are good. I swapped the relay and that was not the problem. The bulbs have less than 100 hours on them. I have read about similar problems.
What to do if your headlights Don’t Come On?
Repairs for this problem = Replaced both headlight bulbs and checked fuses . Answer: As long as all the fuses are good, and the high beams work correctly, then the common problem is a faulty headlamp relay. See picture below.
This 2004 Chevrolet Trailblazer came in with the complaint that neither one of the low beam headlights would work. They both stopped working at the same time. The customer had already paid another shop to have the headlight and dimmer switches replaced. After several days of trying hit and miss diagnosis she called me.
Repairs for this problem = Replaced both headlight bulbs and checked fuses . Answer: As long as all the fuses are good, and the high beams work correctly, then the common problem is a faulty headlamp relay. See picture below.
Terminal #4 is the relay output terminal to the low beam headlight fuses #3 & #6. Terminal #5 is switch battery power from the BCM. I do not recommend testing this terminal with a test light. Terminal #6 is continuous battery ground and is terminated at the lower left side of the engine.
