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

Tiny
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?
Friday, August 12th, 2022 AT 4:37 PM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,663 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
Tiny
NIGHTWOLF1166
  • MEMBER
  • 3 POSTS
Sorry I still have not found my problem. Still looking.
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Saturday, August 27th, 2022 AT 5:39 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Have you checked the fuses?
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Monday, August 29th, 2022 AT 12:26 PM
Tiny
NIGHTWOLF1166
  • MEMBER
  • 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
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,663 POSTS
Is sounds like the BCM is out if they get back to you on the fix please let us know. Use 2CarPros anytime, we are here to help. Please tell a friend.
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Thursday, October 20th, 2022 AT 11:31 AM

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