78 headlight problem
Thread Starter
Melting Slicks
Joined: Oct 2001
Posts: 2,320
Likes: 2
From: Salem Oregon
78 headlight problem
Last time I used the headlights they opened and closed fine. Now they do not open. I just got through cleaning up a rats nest of wiring under the dash from the previous owner, fixing the turn, brake lights in the progress. I have good vacuum everywhere, so I do not think it is a vac. problem. Manual switch under dash opens them right up, and closes. I read the following on a web site and now I have a question I can not find a answer for on the web.
[FUNCTION: The headlamp switch turns the headlamps on and off and signals the vacuum components to open or close the head lamp doors.]
My question is, do they signal electrically, or is there a mechanical valve in the headlight switch? Headlight switch I have is only a couple months old and has been used 10 times give or take. Any info would be a welcome relief to this headache I have got from straining my brain working on it. Thanks in advance,,,Randy
[FUNCTION: The headlamp switch turns the headlamps on and off and signals the vacuum components to open or close the head lamp doors.]
My question is, do they signal electrically, or is there a mechanical valve in the headlight switch? Headlight switch I have is only a couple months old and has been used 10 times give or take. Any info would be a welcome relief to this headache I have got from straining my brain working on it. Thanks in advance,,,Randy
Le Mans Master
Joined: Sep 2002
Posts: 5,235
Likes: 898
From: Myrtle Beach SC
Originally Posted by randy814u
Last time I used the headlights they opened and closed fine. Now they do not open. I just got through cleaning up a rats nest of wiring under the dash from the previous owner, fixing the turn, brake lights in the progress. I have good vacuum everywhere, so I do not think it is a vac. problem. Manual switch under dash opens them right up, and closes. I read the following on a web site and now I have a question I can not find a answer for on the web.
[FUNCTION: The headlamp switch turns the headlamps on and off and signals the vacuum components to open or close the head lamp doors.]
My question is, do they signal electrically, or is there a mechanical valve in the headlight switch? Headlight switch I have is only a couple months old and has been used 10 times give or take. Any info would be a welcome relief to this headache I have got from straining my brain working on it. Thanks in advance,,,Randy
[FUNCTION: The headlamp switch turns the headlamps on and off and signals the vacuum components to open or close the head lamp doors.]
My question is, do they signal electrically, or is there a mechanical valve in the headlight switch? Headlight switch I have is only a couple months old and has been used 10 times give or take. Any info would be a welcome relief to this headache I have got from straining my brain working on it. Thanks in advance,,,Randy
You mention the switch but I've never heard of the switch as being a source of mechanical failure. Probably need a shop manual to trouble shoot the switch. Of course...it may be that in the process of cleaning up the rats nest...you shorted something out or blew a fuse. Check it out first.
