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The red LED is on if:
the cars alarm system is active
you've pressed the button to lock the car from the inside
Closing the car with key fob:
One beep means that a hood, a door, the glove box or the lid in the center console isn't locked. It also can mean that the radio contact is open because the radio was removed or not installed correctly - contact / switch needs to be connected to ground.
Two beeps mean that there is a problem with the alarm control unit.
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My Porsche keyfob, instrument cluster and alarm ecu repair service: https://sportwagendoktor.de
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