reverse polarity door locks

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=64643
Printed Date: May 18, 2025 at 9:47 PM

Topic: reverse polarity door locks

Posted By: msascarbrough
Subject: reverse polarity door locks
Date Posted: October 19, 2005 at 7:16 AM

I am trying to hook up the door locks on a 97 gmc sierra to my alarm which is a aps590. The truck has a 5 wire reverse polarity lock system. I understand how to hook the up to a relay according to 12volts wiring diagrams, but this alarm has three wires for lock and three for unlock. Which wire do I use for the relay and do I have to connect the other wires? The install manual states to refer to the door lock wiring supplement. Thanks for any help anyone can offer.

Mike

Replies:

Posted By: Velocity Motors
Date Posted: October 19, 2005 at 8:50 AM

Not sure of the wire colors but you should have the following identifying acronyms on your installation manual for the door locks:

N/O 87 ( BOTH ) - To fused (+) constant wire

Common 30 ( one for each door ) - Switch side lock

N/C 87a ( one for each door ) - Motor side of door lock

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

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