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 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.
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 headlights not working on my Chevy Trailblazer?
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 relay is in the under hood fuse block. A lot of the time it is overlooked because it is labeled “HDM”.
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.
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.
Is it possible to fix a bad low beam headlight?
Fortunately, fixing a bad low beam is a straight forward process in the majority of vehicles that can be done by most people without just a few hand tools. If replacing your headlight bulb does not work, there may be an electrical issue in your vehicle that should be addressed by a professional. Identify a blown out bulb.
What happens if a headlight comes loose while driving?
If the wires come loose while you are driving, the headlight will stop working. The headlight bulb and assembly should now be connected to the car once again. Be careful not to yank on the assembly with it connected, as you may rip a wire out of the harness.
Why are the headlights on my truck not working?
The low beam on the drivers side of my truck are not working. I replaced the bulb and it still does not work. All other lights work (parking lights etc, ). Any thoughts on what the problem is? helpful? Fuse 16 in left side engine compartment fuse box powers the right side head light low beam.
Why do high beam headlights work but low beams don’t?
Most headlight systems are also designed with a relay that switches the power between low beam and high beam headlights. If this relay goes bad, it could allow power to the high beams, but not the low beams. 1. Headlight Bulbs This is the most common reason we see for why a car’s high beam headlights work but the low beams don’t.
Why does my driver side low beam light not work?
So driver side low beam doesn’t work I replaced the bulb and still nothing, high beam fog light and parking lights work fine, also passenger side turn signal lights are on but do not blink when activated and I get a display saying right front turn indicator failure, I tried replacing those bulbs and still no change any ideas? Thanks in advance
Why are my low beam headlights not working?
If a headlight fuse blows, it could cause the headlights to stop working. Most headlight systems are also designed with a relay that switches the power between low beam and high beam headlights. If this relay goes bad, it could allow power to the high beams, but not the low beams.
What should I do if my Chevy headlights are not working?
To check alignment, park about 10 feet from the garage door wall and turn the lights on. Low beams should be aimed straight forward and hit no higher than your hood line. The high beams should move slightly, but not too much higher than the low beams.