reversing alarm output + dei 451
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=137043
Printed Date: May 17, 2024 at 10:59 AM
Topic: reversing alarm output + dei 451
Posted By: tehbrosta
Subject: reversing alarm output + dei 451
Date Posted: August 02, 2014 at 8:01 PM
I have a 2002 Dodge Dakota with a Audiovox PRO9644 Alarm, the truck does not have power doors. So I installed 2 two wire door actuators. I purchased the DEI 451m wiring harness to wire it into the alarm.
Using a pig tail from a computer power switch and a volt meter I can see the two pins on the alarm module that flips polarity on lock/unlock.
I cut the 3 pin connector off the 451 since it didn't fit in my alarm module. Then I took the blue and green and connected them to the flipping polarity pins on the alarm module.
I'm using a small 12v alarm battery to test the circuit before I hard wire it.
PURPLE / black to +12v on battery.
WHITE/ black & BROWN / black to -12v on battery
voltmeter on blue & green
When I unlock from the keyfob I get +12v, when I lock from the keyfob I get +12v
If I reverse the wires on the alarm module, I end up with -12v for lock and -12v for unlock on volt meter.
With everything connected if I put my voltmeter on the alarm output, they reverse with lock and unlock, but they are NOT reversing on the other side of the relay.
What am I missing?
Replies:
Posted By: catback
Date Posted: August 02, 2014 at 10:54 PM
You need to connect the red from the 451m to +12v, the 451m will then respond to negative (-) pulses from the alarm. You could also do the inverse connect the red to ground, and the 451m will respond to positive (+) pulses from the alarm. While both ways work the former is the defacto standard and the way I would recommend doing it for many reasons.
|