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

head light help

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Old Jan 22, 2014 | 07:53 PM
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Default head light help

Today I turned on my head lights on my 84 and the right one when up and the left one stayed down. Now neither one will move. The head light to light up.
Any ideas?
They work perfect until today.
thanks again
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Old Jan 22, 2014 | 08:13 PM
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St. Jude Donor '08-'09
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Here's the drawing for the 84.. Check the 2 fusible links by the bulkhead connector. One way to check motors is to disconnect the motor and manually open the door, if you plug it back in the door should close. It would be odd for the relays for both sides to fail at the same time..



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Old Jan 22, 2014 | 08:24 PM
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OK cool will do. When you say bulkhead connector, what do you mean?
thanks again
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Old Jan 22, 2014 | 08:29 PM
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The bulkhead connector is where engine wires go through to the inside on the right of the brake booster if you're looking at it..

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Old Jan 22, 2014 | 08:33 PM
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I know what your talking about now. I remember them. thanks again
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Old Jan 23, 2014 | 11:39 AM
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How do I manually get them down?
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Old Jan 23, 2014 | 12:15 PM
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What are you trying to get down??
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Old Jan 23, 2014 | 01:05 PM
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Originally Posted by wendal
How do I manually get them down?
Turn the big black **** on top of each headlight motor to manually open or close each headlight.
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Old Jan 23, 2014 | 02:26 PM
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OK I feel kinda stupid but I do not see a big black knowb.

I got the drivers side to work. Not sure what I did.
The passenger side is up. I Have power on both sides of the fuesable links.
I switch the relays and neither will work. I was hoping that the drivers side relay which works. Would make the passenger side work. When I put the passenger side relay in the driver side it will not work.
I am going to replace the relay. but still a bit confused why the good drivers side relay wont make the passenger side work.
I have power on 2 prongs on the gray plug going into relay.

Last edited by wendal; Jan 23, 2014 at 02:42 PM.
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Old Jan 23, 2014 | 03:28 PM
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Originally Posted by GKK
Turn the big black **** on top of each headlight motor to manually open or close each headlight.
The '84-'87 headlight motors have the manual control ***** on the bottom of the motors. The later motors have them on the top. The '84-'87 motors are a completely different design than the '88-'96 motors. Only the early motors have the limit switches.

If the relay swap doesn't solve the problem, you probably need to clean the limit switches that are inside the motor. The motor must be disassembled to get to these switches.


Last edited by Hot Rod Roy; Apr 3, 2014 at 05:12 PM.
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Old Jan 23, 2014 | 04:52 PM
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Originally Posted by Hot Rod Roy
The '84-'87 headlight motors have the manual control ***** on the bottom of the motors. The later motors have them on the top.
Oops, my Bad!...Thanks, for the correction.
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Old Jan 23, 2014 | 05:48 PM
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If the right side doesn't close check for power both sides of the n/c contacts of the isolation relay.. You could start by unplugging the motor and checking for 12v on the connector (grey and dark green)..


Last edited by ccrazor; Jan 23, 2014 at 05:51 PM.
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Old Jan 25, 2014 | 02:00 AM
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Did you find and fix this problem?? There have been about 148 people that have viewed or followed this problem, its always nice to know the final fix..

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Old Jan 25, 2014 | 03:36 AM
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Clean the connectors real good .
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Old Jan 25, 2014 | 09:48 AM
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The connections was very dirty. I cleaned them and replaced the one relay. Passengers side. When I put the relay in the light went down. I then turned on the lights and both went up. When I turned off the lights only the drivers side went down. I went to turn the passengers side **** on the motor and it went down. I just really just touched it.
I only tried them twice since then and they both work.
So I think I have them fixed. Kinda unsure though.
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Old Jan 25, 2014 | 05:11 PM
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84-87 don't use the bushings. Here's a post by Cliff Harris detailing the procedure. With constant use the worm gear wears out the nylon gear.

http://forums.corvetteforum.com/c4-t...placement.html

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