I'm wondering if perhaps the motor mount is just worn to the point that the motor might shift a bit to metal on metal contact on occasion, causing the vibration to be pronounced. When leaving the light, it shifts again, perhaps back into normal position on the rubber portion, which eliminates the vibration.
Any idea how many hours it takes to replace it?
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1998 Porsche Boxster - Ocean Jade Metallic
1985 Porsche Carrera Targa - Guards Red
1978 Porsche 911SC Euro Non-Sunroof - Grand Prix White
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