C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Headlight Operation '86

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Old Dec 19, 2009 | 03:36 PM
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Default Headlight Operation '86

My headlights on my 86 operate in both directions "very" fast; so fast I'm worried something is going break. Are they supposed to be this fast? Is the speed adjustable?
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Old Dec 19, 2009 | 04:57 PM
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Originally Posted by golfnstuff
My headlights on my 86 operate in both directions "very" fast; so fast I'm worried something is going break. Are they supposed to be this fast? Is the speed adjustable?
I'll look in the FSM and see if I can find anything that may help. But I have a 90.

Oh and I gotta eat first also.
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Old Dec 19, 2009 | 05:28 PM
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I commented in your other thread, but figure I'll do it here as well. Could you get a stopwatch and time the operation to be sure there's actually something wrong?

Also, check the thread in C4Gen for a link to a YouTube video of the lights operating properly, for reference.

Last edited by StealthLT4; Dec 19, 2009 at 06:19 PM.
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Old Dec 19, 2009 | 05:43 PM
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FSM doesn't cover too fast only too slow.

I would get a watch and try to time it as StealthLT4 suggests.

i'm not too sure it's an issue. These things do spin pretty quick when they operate correctly. Has this just started happening?
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Old Dec 19, 2009 | 07:13 PM
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The motors are not adjustable for speed. If the components are new, then the buckets could be opening quickly. Usually, it's hardened grease in the gears that tend to slow the opening/closing speeds and that results in more strain on the motors. That leads to gear failure....

My 87 stil has all the original components (except for the 3 relays) and the buckets only take a couple seconds to open or close.

It's also important to make sure that the stops for the buckets are adjusted properly. If the stops are way off in adjustment, that can allow the motor to keep running and put a big strain on the gears.
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Old Dec 19, 2009 | 10:42 PM
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One one thousand two..... Done. Pretty fast. That is my 84. Less than two seconds.
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Old Dec 20, 2009 | 09:06 AM
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I've had the 86 for a little over a year and they've always been fast. I don't know if hte previous owner repaired or replaced them, I don't think so. They probably open in 1 second. It's almost instantaneous. I don't hear the motor driving after it gets full open so I'm convinced any limit switches are fine. I guess I should be happy they work so well and not worry about it but they're so fast it's scary. Thanks for all the input. Any more ideas, just fire away.
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Old Dec 20, 2009 | 04:40 PM
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The ones on my 86 were about 2 times faster than my 91s are. There was a redesign somewhere along the way. YRMV
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Old Dec 21, 2009 | 03:30 PM
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My 86 headlight assemblies are original, still working well and very fast. They have always been very fast.

Hope they last for a while longer....
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Old Dec 21, 2009 | 05:13 PM
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Just watch for flying headlights when you turn them on. If you see them flying through the air you have a problem.

I personally don't think it's an issue as the other guys have stated. Also, the previous ownder may have replaced the bulbs with the light weight ones to save on the motor. This would cause them to seem fast also but not make it an issue.

Just thinking out loud and wondering. I do that sometimes.
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Old Sep 11, 2010 | 06:29 PM
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Mr. Cruiser sir...

That describes my problem exactly, but I'm not sure how to adjust it to stop the motor continuing to run. Any input?
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Old Sep 11, 2010 | 08:55 PM
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Originally Posted by motorjunkie
One one thousand two..... Done. Pretty fast. That is my 84. Less than two seconds.
My '85s pretty quick
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