Need HELP fixing Headlights
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Joined: Oct 2015
Posts: 92
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Need HELP fixing Headlights
Hello All,
I am still having issues with my headlights even after replacing the gears to the metal design.
I am wondering if anyone can help point me in the right direction for which parts need to be replaced.
Currently both headlights go up and down when turned on and off, however occasionally it will act up in the following ways.
1. The driver side will stay up when turned off, just needs to be cranked down and then it acts fine.
2. Both headlights will occasionally come up when the side marker lights are turned on.
3. Both headlights popped up when I pushed just the fog light button today???
I have the opportunity to by a new Headlight Control Module but I am not sure if this will fix the issue. I have also been thinking of replacing the column headlight switch but today when the lights popped up after pushing the fog light button I was completely stumped.
Let me know your thoughts and hopefully I can finally get rid of these dreaded headlight issues.
Thanks again.
I am still having issues with my headlights even after replacing the gears to the metal design.
I am wondering if anyone can help point me in the right direction for which parts need to be replaced.
Currently both headlights go up and down when turned on and off, however occasionally it will act up in the following ways.
1. The driver side will stay up when turned off, just needs to be cranked down and then it acts fine.
2. Both headlights will occasionally come up when the side marker lights are turned on.
3. Both headlights popped up when I pushed just the fog light button today???
I have the opportunity to by a new Headlight Control Module but I am not sure if this will fix the issue. I have also been thinking of replacing the column headlight switch but today when the lights popped up after pushing the fog light button I was completely stumped.
Let me know your thoughts and hopefully I can finally get rid of these dreaded headlight issues.
Thanks again.
Melting Slicks
Joined: Jan 2009
Posts: 3,275
Likes: 739
From: Miami FL
Did you check your rubber bump stops (4 per headlight)? You can get them from Rodney Dickman (the link I just gave you) in case you need to replace them 
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Joined: Feb 2016
Posts: 91
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From: Providence RI
I replaced the gears in mine a few weeks back. The lights had occasionally both been sticking open. Gear replacement helped but did not fully fix. It seems the car had lost track of whether the lights were open or not. I disconnected the battery, cranked both lights closed with the motors unplugged and the light switch in the off position. Hooked the battery back up, reconnected the motors, and the lights now work correctly.
Thread Starter
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Joined: Oct 2015
Posts: 92
Likes: 1
I replaced the gears in mine a few weeks back. The lights had occasionally both been sticking open. Gear replacement helped but did not fully fix. It seems the car had lost track of whether the lights were open or not. I disconnected the battery, cranked both lights closed with the motors unplugged and the light switch in the off position. Hooked the battery back up, reconnected the motors, and the lights now work correctly.
Thanks for the suggestion.
Has anyone heard of replacing the Headlight Control Module and it alleviating any symptoms?
Thread Starter
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Joined: Oct 2015
Posts: 92
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Dash gauges for voltage do NOT report the state of health of the battery. They report the state of health of the charging system. So correct voltage on the dash gauges tells you the charging system is charging but that has nothing to do with the state of health of the battery.... 
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Melting Slicks
Joined: Nov 1999
Posts: 2,460
Likes: 352
From: Madison Alabama
Following this thread...my 04 Z06/Z16 is doing this on the drivers side. I had to replace the gear and have double and triple checked the bump stops. No love. My battery is new. May try the battery disconnect tip offered above.
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Joined: Oct 2015
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Is your drivers side staying up or going down and popping back up after it was down??
If the latter then there is a shimming fix for this. Go to Rodney Dickmans site at this link and read about the shim kit for the drivers side:
http://rodneydickman.com/catalog/pro...roducts_id=333
There was a GM service bulletin about this problem and the kit that Rodney sells serves the same purpose as what GM was doing when the headlights were under warranty.
If the latter then there is a shimming fix for this. Go to Rodney Dickmans site at this link and read about the shim kit for the drivers side:
http://rodneydickman.com/catalog/pro...roducts_id=333
There was a GM service bulletin about this problem and the kit that Rodney sells serves the same purpose as what GM was doing when the headlights were under warranty.
I have heard having HIDs might cause issues. Are there any solutions for people running HIDs?
Thanks for all the help everyone.