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

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Old Dec 31, 2013 | 10:19 AM
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So we were working on our 1986 C4 project car and we were told the driver side headlight needed a new gear. Got into the area and noticed the headlight wiring was not plugged in. So I plugged it all in and pulled the headlight **** on the dash and the headlight came right up and was on.

The problem is when you push the **** back to the off position. The headlight goes down correctly, but the motor never shuts off so it makes a horrible noise. So now I know why it was unplugged...

I need help fixing the headlight. Is there a pressure switch or something I need to replace? Any help is appreciated.

1986 C4 4+3 Z51 car

Thanks!

Last edited by mscheuler; Dec 31, 2013 at 10:23 AM. Reason: Found Answer
Old Dec 31, 2013 | 10:28 AM
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Lots of threads on this. The 3 nylon bushings in the motor have turned to powder. They are easy to replace and cost about $ 6.00 for each headlight. Search for headlight bushing replacement or something like that and you will find detailed descriptions with pictures.
Old Dec 31, 2013 | 11:04 AM
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If you wish to delete your post or thread, click on the triangle icon
next to the activity light at the bottom-left of your post. A panel will drop down allowing you to send a message to a moderator.
Old Jan 1, 2014 | 03:28 AM
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Originally Posted by Kmcoldcars
The 3 nylon bushings in the motor have turned to powder.
'86 Corvettes don't have those bushings. They didn't start until 1988 or so. Different setup.
Old Jan 1, 2014 | 07:13 AM
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Originally Posted by Cliff Harris
'86 Corvettes don't have those bushings. They didn't start until 1988 or so. Different setup.
Production yes BUT when stock was exhausted of the 3 - wire configurations there was a "package" used to update/upgrade earlier production to the newer 2 - wire configuration. A collision loss of an '84 - '87 that was repaired with NEW OE/GM got that package.

It might have been interesting if the OP commented on what he mentions as "found answer" in his quest for a method to "delete thread". Did he "find answer" or maybe assumed he has? Maybe he'll be back!
Old Jan 1, 2014 | 09:27 AM
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Yes...

is this a matter of national security that we NOT know what the cause of this was/is?
Normally as a member of the Corvette community people will share their solutions so that they may help other forum members...

I already know what the problem is, but I'd still like to see what they say.

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