Another Headlight Question.

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Apr 1, 2007 | 08:39 PM

Vette Crazzy

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From: BETHEL PARK PENNSYLVANIA

Another Headlight Question.

working on the h/l on a 79. with the headlights off they raise very slowly all the way up. and will not close unless i pull the vac supply hose offthe relays.
any ideas. i'm thinking it's the relays

vc

Apr 1, 2007 | 08:52 PM

Star79

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From: Montreal Qc.

Headlight switch under the dash? That's the one that raises the lights but doesn't turn them on.

Apr 1, 2007 | 08:54 PM

Vette Crazzy

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From: BETHEL PARK PENNSYLVANIA

Quote:

Originally Posted by Star79

Headlight switch under the dash? That's the one that raises the lights but doesn't turn them on.

it doesn't do anything

Apr 1, 2007 | 08:56 PM

Glassbowtie77

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From: Long Island New York

Headlight switch or headlight overide switch.

Apr 1, 2007 | 09:03 PM

Vette Crazzy

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From: BETHEL PARK PENNSYLVANIA

Quote:

Originally Posted by supervette77

Headlight switch or headlight overide switch.

if the overide sw was bad...they should still work properly. right????

Apr 1, 2007 | 09:27 PM

Star79

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From: Montreal Qc.

If the override switch "does nothing" it could be broken/defective and is always in the on (up) position.

Same with the vacuum part of the regular headlight switch by the way...

Apr 1, 2007 | 09:32 PM

Vette Crazzy

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From: BETHEL PARK PENNSYLVANIA

Quote:

Originally Posted by Star79

If the override switch "does nothing" it could be broken/defective and is always in the on (up) position.

Same with the vacuum part of the regular headlight switch by the way...

can i take the 2 hoses off the overide sw and hook them together and bypass it as a test??

Apr 2, 2007 | 08:14 AM

Tommy Samuels

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From: Ocala FL

Quote:

Originally Posted by Vette Crazzy

I'm thinking the headlight vacuum to the relays is reversed. Top relay connection (RED) to the back of the actuator. Bottom connection (GREEN) to the front of the actuator.
The relays are spring loaded so they move to close the headlights when vacuum is "off"
With the switch headlight off and the pull down switch pushed up there should not be vacuum to the relay
You can bypass the pulldown by pulling the short jumper line from the headlight switch to the pulldown and connecting the other line from the pulldown to the headlight switch where the jumper was attached

here's the ling to troubleshooting the vacuum system.
http://www.corvette-101.com/vacuum.htm