C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Mar 24, 2008 | 10:09 PM
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Default Ol one eye

Just recently developed some kind of vaccume problem where one head light pops up intermittently while driving. Also, one or both lights SOMETIME pop up then go down when the car is started. 1969. The whole system was rebuilt with new hoses, check valve, etc about 3 yrs ago and worked correctly till just recently.
So, rather then checking out the whole damm system, does anyone have a good guess as what to check first?
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Old Mar 25, 2008 | 04:39 PM
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Often when the lights or wiper door go up when the car is first started and then settle down the problem is in the signal/control system. I would check the relay valve for the light that acts up the most.
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Alan
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Old Mar 25, 2008 | 10:14 PM
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Thanks Alan.
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