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retractable headlights 1990 Coupe

Why do the retractable headlights on my 1990 Corvette work perfectly in cold weather and become balky in hot weather. By hot weather I mean Arizona HOT!

Submitted by: Philip Kiraly


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First is to make sure they’re properly lubricated because metal, plastic etc. expands with heat and contracts with cold. So if not properly lubricated the heat-expanded parts may bind without a layer of lubricant to prevent it. Next is to make sure everything is properly adjusted and there are no worn parts. This can also be an issue that is heat related and activated by expansion. Finally look at the motors themselves to make sure they aren’t drawing too much current when they’re hot. Use a DVOM (Digital Volt Ohm Meter) to measure current draw during operation. If the current draw is high cool the motors to see if current draw drops within specs. If it does the motors are bad and yes they often fail two at a time. Posted by Administrator on 2/29/2016 4:24:46 PM
Philip, I had the same problem recently on my '90. You can fix them by replacing the 3 nylon bushings in each gearbox. Here is a source: There are some great DIY articles if you search for them. You can also replace the 3 bushings with high pressure hose like is sold at ACE hardware, the orange hose is best and is roughly 1/2" in diameter. Mick Tucson/Santa Paula QZRBLU on 5/4/2012 11:29:27 AM

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