Hi there,
Thank you for the donation,
With any problem like this we should never try and second guess the problem, you should go get a diagnostic scan that will detect any set fault codes that are associated with body control functions, this may be a relay, control unit switch or wiring fault as code if set will help locate the exact fault, start here.
Mark (mhpautos)
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Saturday, September 11th, 2010 AT 11:33 PM