Passenger side low beam issue?

2010 CHEVROLET SILVERADO

165,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

RC6069

MEMBER
1 POST

Hello, and thank you for answering my question. My truck listed above the (R) side low beam headlamp isn't working but the bulb is good. I thought the bulb was at fault and replaced it only to find it still not working. Tested the new bulb with a power supply and it worked. I have checked the hdlmp fuses and they are good. I'm looking for the schematic of this circuit to further test it. Thanks for any assistance you can offer.

Apr 10, 2023 at 3:25 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

It is probably the ground because the headlights are wired together. There are two black and two grey wires, Unplug the headlight to test for on two of the wires. Also does the side marker light work? If not, this is another sign the ground is not working. Here is a guide to help you test for ground and the headlight wiring diagrams in the images below:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know what you find. We are interested to see what it is.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Apr 10, 2023 at 5:58 PM