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I had this same thing on my 2000 I bought last Aug. Check the fuse panel, mine was blown. I replaced the fuse and it worked properly. After a few weeks I started hearing grinding from the spoiler when I raised or lowered it. I sprayed some white lithium grease on both piston arms and raised and lowered several times. Each time I moved the spoiler the grinding lessened until it finally went away. It has worked fine ever since.
The driver's window was sounding similar so I sprayed some WD-40 on the tracks and it quieted down and raises and lowers smoothly. After that I tried to hit all the hinges I could find with white lithium as preventive maintenance.
Alex
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Boxster
Cayenne S
Threaded Mode
