Headlight messing up
Thread Starter
Instructor
Joined: Apr 2020
Posts: 233
Likes: 14
From: Dallas Tx
Headlight messing up
Driving at night from work and when I cut my light off both went down but the left one went back up again….ive had this happen a couple months ago when I was doing radiator work and I fixed it but unfortunately it looked like the problem came back. What could be the problem? Is there a permanent fix?
Le Mans Master
Joined: Dec 2017
Posts: 5,561
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From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
I believe their was a technical bulletin on this that involves adding a rubber washer. I don't have it handy. Perhaps someone else can post a copy of it.
Last edited by MWWarlord; Sep 10, 2021 at 10:22 AM.
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 543
From: Appleton WI
It would be helpful to know what you did originally to "fix" the issue the first time. It helps us understand your thought process and the potential issue.
Many times it is related to the white bumpers being worn out or missing. Compare the two headlights to ensure all of the bumpers are still in place. The main culprit is usually the bumper that stops the arm that raises and lowers the headlight. The arm should ideally hit the center of the bumper so some adjusting may be needed. If the bumper has a significant dent from the arm, you can potentially flip the bumper over to utilize the undamaged side or trade it for one of the ones at the rear of the lid. Those are primarily there to stabilize the assembly while the lights are up.
Many times it is related to the white bumpers being worn out or missing. Compare the two headlights to ensure all of the bumpers are still in place. The main culprit is usually the bumper that stops the arm that raises and lowers the headlight. The arm should ideally hit the center of the bumper so some adjusting may be needed. If the bumper has a significant dent from the arm, you can potentially flip the bumper over to utilize the undamaged side or trade it for one of the ones at the rear of the lid. Those are primarily there to stabilize the assembly while the lights are up.
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Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,144
From: Sleepy Hollow- NJ
It would be helpful to know what you did originally to "fix" the issue the first time. It helps us understand your thought process and the potential issue.
Many times it is related to the white bumpers being worn out or missing. Compare the two headlights to ensure all of the bumpers are still in place. The main culprit is usually the bumper that stops the arm that raises and lowers the headlight. The arm should ideally hit the center of the bumper so some adjusting may be needed. If the bumper has a significant dent from the arm, you can potentially flip the bumper over to utilize the undamaged side or trade it for one of the ones at the rear of the lid. Those are primarily there to stabilize the assembly while the lights are up.
Many times it is related to the white bumpers being worn out or missing. Compare the two headlights to ensure all of the bumpers are still in place. The main culprit is usually the bumper that stops the arm that raises and lowers the headlight. The arm should ideally hit the center of the bumper so some adjusting may be needed. If the bumper has a significant dent from the arm, you can potentially flip the bumper over to utilize the undamaged side or trade it for one of the ones at the rear of the lid. Those are primarily there to stabilize the assembly while the lights are up.
start with inspecting the rubber stopper/bumpers. Flip them over of they are marred/indented. If that's not it it's likely the plastic gear in the housing itself. You can upgrade to brass or replace the entire pop up light motor assembly. 
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
Intermediate
Joined: May 2021
Posts: 49
Likes: 7
Driving at night from work and when I cut my light off both went down but the left one went back up again….ive had this happen a couple months ago when I was doing radiator work and I fixed it but unfortunately it looked like the problem came back. What could be the problem? Is there a permanent fix?
Racer
Joined: Mar 2021
Posts: 255
Likes: 72
From: Maryland
(VetteNuts sells a great kit and the bumpers too) ..it's what I did when I had the same problem. Has not returned. I ordered a set of HIR halogen bulbs from Daniel Stern so that I was good to go. Great night output. Headlights sound a lot more stout when they go up/down now too. I just hate fixing the same problem more than once so I'd want someone to tell me this
Last edited by SkyTigress; Sep 11, 2021 at 02:05 PM.
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