Volvo S40 The S40 is Volvo's most affordable sedan with all the amenities of a luxury sports car.

Alarm LED flashing rapidly

Old Dec 17, 2015 | 07:19 AM
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Default Alarm LED flashing rapidly

Seem to have a small issue on my 04 S40 (96-04 model). Per the manual -

LED flashes rapidly for 15 seconds after the ignition has been switched on - a fault has been detected in the alarm

Anyone else have this and can point me in the right direction? Possibly a switch on one of the doors acting up or the hood. Haven't checked to see if an OBD code is there or the siren is working but will do later today.
 
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Old Dec 17, 2015 | 12:02 PM
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Update. Issue is gone for now. There was no ODB code and the panic button worked (hold for 3 sec) and activated the siren, so it's not the 7.2v battery with the siren. The LED is no longer flashing and the alarm triggers. My guess is a sticky relay or something.
 
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