my alarm is malfunctioning, often going off on its own- on 1999 Porsche 911

car has 145000 miles. recently alarm malfunctioning and emitting lite on dash not appearing at all.

by in Kennett Square, PA on May 11, 2011
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1 answer
ANSWER by , May 11, 2011
It could do this for many reason which requires an OE diagnostic computer, but I'd start by checking the battery with a good battery tester. This would be the first and cheapest test. Zee