Headlights won't close
Team Owner
Joined: Sep 2006
Posts: 31,270
Likes: 4,362
From: Westminster Maryland
Hi CS,
Have you done any work in the engine compartment or under the dash that may have caused this?
Are they still opening normally?
Are the headlights responding to the vacuum override switch below the steering column? It's the switch on the left.
With the headlight switch OFF…. pull down on the override…. the doors should open, but the lights won't illuminate.
Pushing up on the switch should close the doors.
Does that happen?
Regards,
Alan
This switch opens and closes the headlight doors.
Have you done any work in the engine compartment or under the dash that may have caused this?
Are they still opening normally?
Are the headlights responding to the vacuum override switch below the steering column? It's the switch on the left.
With the headlight switch OFF…. pull down on the override…. the doors should open, but the lights won't illuminate.
Pushing up on the switch should close the doors.
Does that happen?
Regards,
Alan
This switch opens and closes the headlight doors.
Last edited by Alan 71; Mar 10, 2017 at 03:07 PM.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Alan is right.. If the switch is pulled it will block vacuum to the relay. If the switch isn't pulled, go to the small hose on top the relay and see if you have vacuum there. It takes vacuum on that hose to pull the relay up and close the lamps.
-Willcox
-Willcox
Thread Starter
Pro
Joined: Apr 2004
Posts: 594
Likes: 0
From: Gotham City CA
They open fine, but won't close unless I do it manually. The over-ride switch is not activated. It is both lights, not just one. I put on all new hoses about 10 years ago, so it is not a cracked hose. The engine is too loud to hear a vacuum leak, though.
Last edited by CoolShark; Mar 10, 2017 at 06:25 PM. Reason: misspelling
Team Owner
Joined: Sep 2006
Posts: 31,270
Likes: 4,362
From: Westminster Maryland
Hi cs,
It's odd that both relays or both actuators decided to fail together.
Is your headlight system in fact using 2 relays?
Are you certain that the red striped hoses haven't been disturbed in some way?
Regards,
Alan
It's odd that both relays or both actuators decided to fail together.
Is your headlight system in fact using 2 relays?
Are you certain that the red striped hoses haven't been disturbed in some way?
Regards,
Alan
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Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Here is a video on how to test the components of the headlamp system:
1968-1982 Corvette Headlamp Vacuum Diagnostics Help
1968-1982 Corvette Headlamp Vacuum Diagnostics Help
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
