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Mechanical Engineer
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I have a secrity backup battery and was wondering if it would work on the factory alarm? Thanx.
 
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You could hook it up but it wouldn't work that great. Reason is that the cars door pins wont have power to send a trigger to the alarm if the power is cut which will just leave the alarm on doing nothing. If security is that important you best bet is a nice aftermarket alarm.
 
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