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motion sensor doesn’t work

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=116251
Printed Date: July 15, 2025 at 7:59 AM


Topic: motion sensor doesn’t work

Posted By: fbpprelude
Subject: motion sensor doesn’t work
Date Posted: September 10, 2009 at 7:03 PM

I've recently installed an autopage rf-425lcd pager alarm in my 98 honda prelude. The alarm has a dei 520t battery back up also. Everything is working fine except for the motion sensor. The motion sensor is connected to the optional sensor harness. When it is plugged in and armed; a minute or two later it will do a full trigger. When I put it on the lowest setting counter-clockwise it will still go off. Do I need to add a diodes on the blue optional sensor harness and blue 10 pin harness?

optional sensor harness:          crime guard aut94m motion sensor
        red       =   red
        blue      =   blue
        green     =   green
orange (ground when armed wire) =   black
(10 pin harness)

dei 520t battery back-up:
grey       = red (alarm 5 pin main wire harness)
red        = white (ignition harness constant 12v)
blue    = blue (trunk/hood/instant trigger)(10 pin harness) 



Replies:

Posted By: kondziolka
Date Posted: September 14, 2009 at 3:57 PM

If you are using the ground when armed output to run a starter kill, and your sensor, you would need to diode both triggers as well as both blue wire triggers.

a good test is to isolate the sensor one trigger at a time ( i.e. diconnect starter kill ) and see if there is any change. Same with the blue triggers.

Hope this helps.



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