Thread: Alarm problem
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Old 09-21-2002, 08:25 PM
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jbaj007 jbaj007 is offline
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Join Date: Jun 2001
Location: Santa Monica, CA
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Assuming orig. factory alarm. There is a microswitch associated with ea. front door lock cylinder (and trunk). This arms/disarms the alarm. These are not available as a separate piece when I checked last and the whole deal has to be replaced if bad. They are suspect due to weather intrusion. There is a plug to the pigtails on this switch (gn.,yl.,br/bk wires last I saw one) that cracks at the wires insertion point and this can sometimes be repaired with a steady soldering hand.

The central locking system uses a separate swich on the actuator itself so this doesn't help the alarm any.

My bet is on a cracked green wire at the micoswitch plug.
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1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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