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7/11/13 9:42pm - Original Message: 'bad headlight'
RedVetteinprogress
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West Bend, WI - USA

Vette(s):
1985 silver coupe & 1975 red coupe

Joined: 3/18/2010
Posts: 46
I need a little help with a head light problem. I was driving my '75 the other night and I put the thing away after that and the drivers side head light would not go back down. The other side works just fine. I don't know much about these systems but I gave the stuff a good visual and didn't see anything that looked funny like a hose off, etc. Could somebody out there give me a good place to start with troubleshooting this thing. Thanks, Darrell

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7/12/13 7:17am - Reply: 'Re: bad headlight'
manchestershark Lifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1900
 Vaccume leak. Spray Starter fluid on all hose ends for that side. With an increase in engine speed at idle you have found the leak.

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7/12/13 9:47am - Reply: 'Re: bad headlight'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19457
Either the actuator has sprung a leak, or there is an issue with the vacuum relay valve for that side. Most likely the relay valve. Take the hoses off of the actuator(the large "can"), and swap them. If the light goes down then, your problem is with the relay valve. If it does not go down, there is a leak, or other problem with the actuator. The front seals on them go out all the time, but they are fairly easy to replace. IF the relay valve is the problem, you'll need to replace it...no repair for those, but there are a couple of guys that do rebuild them.

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Joel Adams
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7/12/13 11:04am - Reply: 'Re: bad headlight'
my7t1 Lifetime Member
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Dorr, MI - USA

Vette(s):
71 Colonnade Hardtop Coupe Torch Red with black interior originally L48 built to push around 360hp

Joined: 8/21/2002
Posts: 2580
I had the same problem with my 71. Like Joel pointed out, could be the actuator seal. If that's what it is, you can buy a kit to repair it. Not very expensive and easy to do. "T"

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7/13/13 2:06pm - Reply: 'Re: bad headlight'
OH6A Lifetime Member
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Cadiz, KY - USA

Vette(s):
64 Convertible 73 Coupe 74 Convertible 63 Corvair Spyder Convertible

Joined: 8/26/2002
Posts: 244
Put in electric motors and eliminate the problem forever.

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