Auxiliary Powered Siren
The auxiliary powered siren is situated in the left hand rear of the engine bay (viewed from the front bumper). The siren contains electronic circuitry for producing the warning tone when the alarm is triggered. The siren also contains a rechargeable battery that is used to power the siren when the alarm is triggered.
In the armed state the auxiliary powered siren is armed by the BC1 holding the arming line to ground, if the power to the BC1 is lost the arm line will be released, which will send power to the auxiliary powered siren. This will cause the auxiliary powered siren to go into its internal triggering sequence.