2001 Buick Century Driver Side High beam headlight not working.

Asked by Guru62TPZ Apr 01, 2020 at 06:37 PM about the 2001 Buick Century Limited Sedan FWD

Question type: Maintenance & Repair

My left side (driver side) headlight only works on low beam. The right
headlight works on both high and low and the switch works fine. The lefty
high beam is the only one that does not. I replaced bulb first and it did not fix
it. I tested the bulb on the right headlight and it works fine so it's not the bulb.
I put a tester on every fuse on the car both under hood and on the right side
of the dashboard. I put a tester on the connector that the high beam bulb
plugs in to in the headlight housing and it is getting power. I put a tester on
each prong that the main connector that plugs into the headlight housing
from the fuse box and they all test out fine. I compared the test to the right
sight connector for reference as it is working correctly. So the left connector
is getting power identically to the right connector. WHY THE HECK IS MY
HIGH BEAM NOT WORKING?? Is there a relay for each headlight to switch
from high to low? Or does 1 relay handle that for both sides? At this point
that is the only thing possible that it could be right? Which relay would need
to be replaced? Thanks in advance.

1 Answer
2,230

RickMN answered 4 years ago

I don't see any relays in the headlight circuit. Power flows from the fuse to the left high beam on the orange wire and leaves for ground on the pink wire. Check for ground on the pink wire terminal in the high beam bulb socket. The pink wire goes to the headlight switch and from there it goes to ground. Both high beams get grounded through the headlight switch, so if you don't get ground in the bulb socket, you've got an open somewhere between the socket and the headlght switch. Fuse for left high beam is in the underhood fuse box

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