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c5 Corvette headlights wont go down!!!

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Old May 18, 2016 | 10:30 PM
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Default c5 Corvette headlights wont go down!!!

I was wondering if anyone knows about why the headlights wont go down on c5 corvette after starting the car and turning the setting to off. They do sometimes but not all the time as of tonight they wouldn't at all. I assume that its not a fuse because it random and they go up and down when I start and turn off the car. I was wondering what ground I should check or what wires in the fuse box? or the blinker is bad but everything else on the blinker works just fine which leads me to think that it is the grounds. thanks for your help you are a big help!!
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Old May 18, 2016 | 10:41 PM
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Originally Posted by chuck1992
I was wondering if anyone knows about why the headlights wont go down on c5 corvette after starting the car and turning the setting to off. They do sometimes but not all the time as of tonight they wouldn't at all. I assume that its not a fuse because it random and they go up and down when I start and turn off the car. I was wondering what ground I should check or what wires in the fuse box? or the blinker is bad but everything else on the blinker works just fine which leads me to think that it is the grounds. thanks for your help you are a big help!!


1. Assumption or not, check fuse #6 in the passenger foot well compartment.


2. Check your ground (driver side, ahead of the windshield washer reservoir) for tightness and cleanliness.


3. If not either of these two, you may need a new light switch / stalk.


Good luck!
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Old May 19, 2016 | 04:54 AM
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Does this happen only at night or when it is getting dark. If so check to see if your twilight setting is "on". This is found in your owners manual.
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Old May 19, 2016 | 07:42 AM
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Originally Posted by Ducati Guy
Does this happen only at night or when it is getting dark. If so check to see if your twilight setting is "on". This is found in your owners manual.
OR in a dark garage.
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Old May 19, 2016 | 03:43 PM
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I don't have the owners manual how do i turn it off
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Old May 19, 2016 | 04:43 PM
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Originally Posted by chuck1992
I don't have the owners manual how do i turn it off
Just press OPTIONS until it says Twilight and then press reset to change ON to OFF. Any other button to get out.

Last edited by Fed Up; May 19, 2016 at 04:45 PM.
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Old May 19, 2016 | 10:14 PM
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Originally Posted by Fed Up
Just press OPTIONS until it says Twilight and then press reset to change ON to OFF. Any other button to get out.

What he said. Easy as pie. And get yourself a manual. Lot's of helpful stuff in there.
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Old May 23, 2016 | 08:00 PM
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what kind of manual should I get?
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Old May 23, 2016 | 11:00 PM
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Originally Posted by chuck1992
what kind of manual should I get?
Owners manual. Easy to find usually on Ebay.

You can learn a lot from it.
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Old May 24, 2016 | 08:32 AM
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http://www.corvetteactioncenter.com/...ual-links.html

Jim
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Old May 24, 2016 | 12:16 PM
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Originally Posted by chuck1992
what kind of manual should I get?
THAT or spend a LOT of time on the forum... I have NO manuals and get along fine, because this forum is SO freaking awesome...
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Old May 24, 2016 | 08:35 PM
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Originally Posted by 73Corvette
THAT or spend a LOT of time on the forum... I have NO manuals and get along fine, because this forum is SO freaking awesome...
But where are they at 3:00 am..or when you are stuck on the road. Or....when you are bored and want to read something you like.
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Old May 25, 2016 | 08:12 PM
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These cars are complex compared to earlier Corvettes. I cannot imagine trying to keep one running without the service manuals - they are fact, not hearsay.

Re headlights. When you turn them on, power goes to the motor. When you turn the switch back to "off" the motor gets a shot of power to bring them back down. The service manuals have the wiring diagram which enables you to understand exactly how the headlight up/down mechanism functions.

They were my very first C5 accessory purchase. Spend the money and buy them - and make sure they are for your year, things changed over the life of the C5.

Last edited by jackthelad; May 25, 2016 at 08:16 PM.
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Old Jun 14, 2016 | 07:31 PM
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Originally Posted by chuck1992
I was wondering if anyone knows about why the headlights wont go down on c5 corvette after starting the car and turning the setting to off. They do sometimes but not all the time as of tonight they wouldn't at all. I assume that its not a fuse because it random and they go up and down when I start and turn off the car. I was wondering what ground I should check or what wires in the fuse box? or the blinker is bad but everything else on the blinker works just fine which leads me to think that it is the grounds. thanks for your help you are a big help!!
Hello: You found out what was the problem with the headlights ? I have the same problem, but mine go down only if the high beam is on, if you can help me I appreciate your help. Thank you
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Old Jun 14, 2016 | 08:07 PM
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Probably your "twilight" mode is ON... you need to go to the DIC options and turn it OFF...
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Old Jun 14, 2016 | 09:47 PM
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it is off right now, they only go down when the high beam are on!
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Old Jun 14, 2016 | 10:30 PM
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Originally Posted by 73Corvette
Probably your "twilight" mode is ON... you need to go to the DIC options and turn it OFF...
Yep, that would be my first place to look. I turned the twilight to ON, and what you are describing was the result. The lights would not turn down. turned the twilight to OFF and all was well.

I don't get it, but it worked.
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Old Jun 15, 2016 | 09:41 PM
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My '00 does this same thing. I've found that if I turn the headlight switch OFF with the engine still running, they fold down every time. If I shut off the engine first and then turn off the headlights, they stay up. I rebuilt both headlight motors with brass gears and it made no difference.
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Old Jun 15, 2016 | 11:01 PM
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Originally Posted by zwoobah
My '00 does this same thing. I've found that if I turn the headlight switch OFF with the engine still running, they fold down every time. If I shut off the engine first and then turn off the headlights, they stay up. I rebuilt both headlight motors with brass gears and it made no difference.
How easy was the brass gear upgrade?
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Old Jun 15, 2016 | 11:07 PM
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Originally Posted by gpruitt54
How easy was the brass gear upgrade?
Getting the headlight motors out of the car takes some time and fiddling. Not much room to swing a wrench or get your fingers in place, but it's not too bad. Otherwise the job is straightforward. I used this kit, I think:

http://my.execpc.com/~rodney1/vettegears/index.htm
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