Crazy Headlight....HELP!
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Joined: Feb 2004
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From: MAYWOOD MO
Crazy Headlight....HELP!
ON my 71 coupe the driver's side headlight has opened and closed very slowly. Also the wiper door opens any time the headlights are on. I have been checking the system with a handheld vacuum pump, and found that the vacuum relay for the driver's headlight was bad. Upon replacing it today, the headlight opened and closed quickly with no hesitation. Everything is great until I turn off the ignition and the headlamp opens.
Before the new relay when the headlights went down they stayed down, but now with the new relay the headlight pops back up when the ignition is off.
So what's going on?
Before the new relay when the headlights went down they stayed down, but now with the new relay the headlight pops back up when the ignition is off.
So what's going on?
Le Mans Master
Joined: Jan 2006
Posts: 8,319
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From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Originally Posted by nelson71
ON my 71 coupe the driver's side headlight has opened and closed very slowly. Also the wiper door opens any time the headlights are on. I have been checking the system with a handheld vacuum pump, and found that the vacuum relay for the driver's headlight was bad. Upon replacing it today, the headlight opened and closed quickly with no hesitation. Everything is great until I turn off the ignition and the headlamp opens.
Before the new relay when the headlights went down they stayed down, but now with the new relay the headlight pops back up when the ignition is off.
So what's going on?
Before the new relay when the headlights went down they stayed down, but now with the new relay the headlight pops back up when the ignition is off.
So what's going on?
chekc the override switched inder the dash, see if it is damaged or leaking
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Originally Posted by nelson71
The override switch is OK, I tested it with a vacuum pump and it is not leaking.
Then you've got something crossed for sure, break out the diagrams
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Originally Posted by nelson71
Any ideas why the headlight would pop up once the engine is turned off? Or why it would do it with a new relay, but not with the old leaky relay?
the best thing to do would be to get the Vac headlight diagnostics manual available from the usual suspects, and use that to isolate the trouble
.02
tim
