Vacuum problem
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,239
Likes: 74
From: Palatine, Peoples Republic of Illinois
St. Jude Donor '09-'10-'11-12-'13-'14-'15-'16-'17-‘18
NCM Sinkhole Donor
Vacuum problem
Had the dash all apart to install Dakota Digital VHX gauges and now have a problem with the headlights. Looks like a leak somewhere - hope someone can help track it down. When the car starts the headlights raise and lower. While the car is running they operate as they are supposed to. When I shut the engine off the right headlight opens. The left one occasionally try to open but doesn't.
The searches I've done suggests a bad relay but I went to a single relay years ago and the system has worked fine. Could it be a check valve or headlight switch?
Thanks
Jim
The searches I've done suggests a bad relay but I went to a single relay years ago and the system has worked fine. Could it be a check valve or headlight switch?
Thanks
Jim
Le Mans Master
Joined: May 2006
Posts: 5,814
Likes: 414
From: Pittsburgh suburbs Pa.
Had the dash all apart to install Dakota Digital VHX gauges and now have a problem with the headlights. Looks like a leak somewhere - hope someone can help track it down. When the car starts the headlights raise and lower. While the car is running they operate as they are supposed to. When I shut the engine off the right headlight opens. The left one occasionally try to open but doesn't.
The searches I've done suggests a bad relay but I went to a single relay years ago and the system has worked fine. Could it be a check valve or headlight switch?
Thanks
Jim
The searches I've done suggests a bad relay but I went to a single relay years ago and the system has worked fine. Could it be a check valve or headlight switch?
Thanks
Jim
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,239
Likes: 74
From: Palatine, Peoples Republic of Illinois
St. Jude Donor '09-'10-'11-12-'13-'14-'15-'16-'17-‘18
NCM Sinkhole Donor
The system works normally with the engine running. I don't think it would work if a line was disconnected.
Thanks
Thanks
Safety Car
Joined: Sep 2013
Posts: 4,355
Likes: 2,633
From: Draper Utah
Sounds like a vacuum leak in the command side of your vacuum system. Since it started when you had the dash apart my guess is one of your vacuum lines has come loose. Check that they are all plugged in. Check that the lines to the override switch are fully connected, I've knocked those loose before when working under the dash.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,239
Likes: 74
From: Palatine, Peoples Republic of Illinois
St. Jude Donor '09-'10-'11-12-'13-'14-'15-'16-'17-‘18
NCM Sinkhole Donor
Thanks. I'm going to check the override lines again. I had to reinstall the "elbow" adapters on the valves because of the change in configuration down there. That might be the problem.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,239
Likes: 74
From: Palatine, Peoples Republic of Illinois
St. Jude Donor '09-'10-'11-12-'13-'14-'15-'16-'17-‘18
NCM Sinkhole Donor
Ended up being 2 problems: Lines were reversed on the headlight switch and the rubber elbow on the override switch leaked badly. I corrected the lines on the HL switch and eliminated the elbow on the override. All is well!
Instructor
Joined: Jul 1999
Posts: 138
Likes: 1
From: Brick New Jersey
Isn't that a GREAT feeling when you pulled the headlight switch and the lights popped up like they're supposed to !! Ha !! Nobody understands that feeling unless you've been in that situation !! I've been there too !!..... Tom.
Last edited by tomdoc; May 23, 2015 at 12:01 AM.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,239
Likes: 74
From: Palatine, Peoples Republic of Illinois
St. Jude Donor '09-'10-'11-12-'13-'14-'15-'16-'17-‘18
NCM Sinkhole Donor
I know what you mean. You're almost embarrassed to drive the car in public with one eye open!
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