Driver side headlights do turn on, but they are very dim, how do I fix this?

NIGHTWOLF1166

MEMBER
2003 BUICK CENTURY
3.0L
V6
2WD
AUTOMATIC
170,000 MILES

And they are both on at same time. This also affects my passenger side lights, making them not as bright as they should be, and they are both on. I disconnected the driver side and passenger side works fine. Seems to be grounding out somewhere between the two. How do I go about finding the problem?

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

There are four fuses that run the headlight system we should check first, (radio, HVAC, RFA, Cluster, TEL - Park, HDLP-R and HDLP-L) if these are okay, we need to check the system ground which is below the left side of the steering column. Here is a guide to help use and I have included the headlight wiring diagrams so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

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

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Saturday, August 13th, 2022 AT 9:28 AM

NIGHTWOLF1166

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3 POSTS

Sorry I still have not found my problem. Still looking.

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Saturday, August 27th, 2022 AT 5:39 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Have you checked the fuses?

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Monday, August 29th, 2022 AT 12:26 PM

NIGHTWOLF1166

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3 POSTS

All fuses were good. I replaced head light switch but that did not solve problem. I was about to replace turn signal/dimmer switch, I have sold car so they will have to figure it out.

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Wednesday, October 19th, 2022 AT 9:32 PM

KEN L