Headlight Problem

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12 years 10 months ago #16032 by GlennS
Headlight Problem was created by GlennS
A couple of weeks ago I was pulling out of a parking lot, it was dusk and when I turned the headlights on they only came up half way. They stayed that way for a a couple of miles and then can the rest of the way up.

Tonight I thought about that and tested the headlights in the garage. I turned them on and off a couple of times. On the third time the headlights did not come up but they turned on. I tried a couple more times with the same result. The headlights will lite but do not rise.

I am looking for suggestions as to what the cause of the problem might be.

Thanks,

Glenn

Glenn Simpson

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12 years 10 months ago #16037 by mm928
Replied by mm928 on topic Headlight Problem
Sorry Glenn, those things to be pretty robust. You know how to bring them up manually right? I am sure someone knows and will post soon.

I have had one not go all the way down, but that turned out to be a piece of something else getting in the way that I did not secure.

1983 928S - 16v 4.7L L-Jetronic
Slate Blue Metallic w/ Blue Leather
85/86 exhaust manifolds
Y-Pipe
SS Hi-perf Cat
S4 springs
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VIN: WP0JB0926DS861180
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12 years 10 months ago #16056 by GlennS
Replied by GlennS on topic Headlight Problem
Thanks Mike, yes I do know how to operate them manually. I am hoping it is a relay or something like that. I expect that one of our peers have some experience with the circuit.

Glenn Simpson

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12 years 10 months ago #16060 by 928mac
Replied by 928mac on topic Headlight Problem
Make sure the mechanism is clear and not falling off or it may punch a hole in the rad.
Do you have a set of manuals?

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12 years 10 months ago #16066 by GlennS
Replied by GlennS on topic Headlight Problem
I have the manuals on CD. Is there guidance in the manual on the headlights?

Glenn Simpson

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12 years 10 months ago #16068 by 928mac
Replied by 928mac on topic Headlight Problem
I found this info

license-plate lights are the Same fuse: #10, 5 amp.

Also check for 12 volts (with lights turned on) on the red/yellow wire at the potentiometer (adjusting knob). The brown/red wire is ground, check for zero ohms to a clean chassis point. The voltage on the green/yellow will vary with the knob setting, this is what tells the motors what position to move to.

and this link
forums.rennlist.com/rennforums/10801017-post1.html

and this one
forums.rennlist.com/rennforums/928-forum...?highlight=headlight

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