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

2003 BUICK CENTURY
170,000 MILES • 3.0L • V6 • 2WD • AUTOMATIC
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NIGHTWOLF1166
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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?
Aug 12, 2022 at 4:37 PM
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STRAILER
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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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Aug 13, 2022 at 9:28 AM
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NIGHTWOLF1166
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Sorry I still have not found my problem. Still looking.
Aug 27, 2022 at 5:39 PM
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STRAILER
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Have you checked the fuses?
Aug 29, 2022 at 12:26 PM
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NIGHTWOLF1166
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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.
Oct 19, 2022 at 9:32 PM
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STRAILER
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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.

Oct 20, 2022 at 11:31 AM