Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello & Welcome,
Do you have a 12 volt test light or multimeter you can use to do some tests?
Also, are there any other lights that do not work?
OK - Thanks,
So it sounds like the low beam headlights are the only lights that are not working.
Does the high beam indicator on the dash work properly (turns on & off when switching between low & high beams)?
Thanks for that information.
It sounds like either you have an issue with the low beam lights themselves (they sometimes do go bad at the same time, or there is a problem with the headlight dimmer switch.
I would really like you to have a test light or multimeter to test this, but you could use a fused jumper wire (a fuse with wires attached) to do some testing. If you look at the schematics below, you will see where the dimmer is switched between the high and low beams. If you can use a fuse jumper wire to connect the Dark Blue wires at the back of the low beam bulbs to a good frame ground, then you could test if the bulbs are good. If the bulbs are good, the lights will come on when you make that connection.
Be careful to NOT touch the orange wires with the jumper, or you could blow a fuse.
I hope this helps. Please let me know what you find or if you have more questions.
Take Care, Greg A.
Yes, the bulbs could go out at the same time. It has happened to me too.
If the high beams are working, and the low beams are not, then the most likely component would be the dimmer switch. The schematic shows that the only difference between the low and high beam setting it that the ground side of the circuit is switched between the low and high beam bulbs.
Again, it would be nice to test first before replacing a part, but that is the most likely suspect.
You are quite welcome,
Please let me know how it turns out.
Hi again & thanks for letting me know.
I am glad I could save you some time & money on this project. Please let us know if you need any further help in the future.
I just recently purchased a 2004 Tahoe with 155000 miles