how do i go about testing the factory alarm in my 87 300e? ive never had it go off so i want to see if its still operational.
also, im planning on having a viper alarm installed due to expensive audio system. can the factory alarm continue to work as a backup. ( extra noise and more wires to cut)
will it interfear with the viper alarm?

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87 300E
BLACK GOLD WITH CREAM INTERIOR, SPOILER, AIRDAM
CLEAR MARKERS

87 420SEL
BRONZE WITH CREAM INTERIOR