Headlight Problems On '80 Vette
Thread Starter
7th Gear
Joined: Nov 2007
Posts: 7
Likes: 0
Headlight Problems On '80 Vette
Hey,
Does anyone know what would cause the headlights to NOT go up
and down? I have changed the vacuum lines, canister, relay valves,
& actuators. They still don't work.
Help,
WH
Does anyone know what would cause the headlights to NOT go up
and down? I have changed the vacuum lines, canister, relay valves,
& actuators. They still don't work.
Help,
WH
Advanced
Joined: Jun 2008
Posts: 63
Likes: 0
From: Wichita Falls (Lake Arrowhead) Texas
Try running a new vacuum line directly from the carb to the inlet of each side of the vacuum relay mounted in the nose. One side will make it go up, and the other side go down. You can do this on each of the relays to check each light assembly. (I'm not sure if you have one or two relays near the actuators). This will bypass your headlight switch and manual override switch. It should work if the relays and actuators are OK. Of course, you'll need to have your engine running to create the vacuum. Beats having to pull the dash to get to the headlight switch. I did this on my '82 and found that I had bad check valves and deteriorated line off of the intake. Good luck, Amigo!!!
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Vacuum Troubleshooting Guide at www.corvette-101.com
Look for troubleshooting guide on the left side of the page. Lots of good info in there. Should help to narrow down the problem for you.
Look for troubleshooting guide on the left side of the page. Lots of good info in there. Should help to narrow down the problem for you.
Le Mans Master
Joined: Oct 2005
Posts: 6,247
Likes: 471
From: Glen Allen, VA
Get yourself a vacumn gauge, it's only about 20 bucks. That's what I used to figure mine out. My problem turned out to be the seals on the actuators, which by replacing yours, you should have eliminated that problem.
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Thread Starter
7th Gear
Joined: Nov 2007
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Wayne
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Joined: May 2006
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From: Dayton, Ohio
Le Mans Master
Joined: Jul 2006
Posts: 8,117
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From: charlotte north carolina
check the override valve under the steering column, it should be pushed up for normal operation. if the operation was normal, but slow, before you started changing things, you may ahve reversed one or more lines.
Thread Starter
7th Gear
Joined: Nov 2007
Posts: 7
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In the meantime I have the lights in the up position and moving on to another issue. I have a leak in one of the power steering hoses. Have got to fix that.
Thanks,
Wayne
Thread Starter
7th Gear
Joined: Nov 2007
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Thanks,
Wayne
Thread Starter
7th Gear
Joined: Nov 2007
Posts: 7
Likes: 0
