Headlight Vacuun Issues
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Joined: Nov 2011
Posts: 82
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Headlight Vacuun Issues
I have a 1972 C3 I am in the process of restoring. Project is 99 percent done. My headlights will open and close fine with the bypass switch, but will not funtion with the headlight switch. My first thought was to replace the "Shangai Suprise" new headlight switch with another one. Still have same issue.
Any suggestions??
Any suggestions??
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
I have a 1972 C3 I am in the process of restoring. Project is 99 percent done. My headlights will open and close fine with the bypass switch, but will not funtion with the headlight switch. My first thought was to replace the "Shangai Suprise" new headlight switch with another one. Still have same issue.
Any suggestions??
Any suggestions??
Drifting
Joined: Jul 2006
Posts: 1,259
Likes: 154
From: Deplorableville Nebraska
Do you have the vacuum lines in the correct location on the headlight switch? It seems to me there was conflicting diagrams on some of the kits or AIM for the headlight vacuum lines.
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
First place I would look. Most vacuum diagrams out there have the two hoses at the headlight switch reversed. Rather than go that route, just remember this. The vacuum source (from manifold) ALWAYS goes to the port closest to the pull ****. If that doesn't work, there are ways to check the switch vacuum without pulling it out. Let us know.....
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Melting Slicks
Joined: May 2006
Posts: 2,590
Likes: 403
From: Nashville TN
St. Jude Donor '09
I had the same issue, but was able to disassemble/reassemble the vacuum switch part of the headlight switch and got it working. Pretty poor design.
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