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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=139943
Printed Date: May 13, 2025 at 10:51 PM


Topic: Reverse polarity door locks

Posted By: monty862
Subject: Reverse polarity door locks
Date Posted: December 13, 2015 at 3:40 PM

Installing keyless entry in a 1989 Mustang. Reverse polarity door locks. Cut the two wires in the kick panel and made four solder splices. Closed up the kick panel and ran the four wires to the relays. I can easily identify the two switch side wires and their function with a volt meter. However I didn't think about the motor side. Is there a way to identify which wire was originally connected to Lock/Unlock without removing kick panels or door panel? It seems to work correctly wired either way but I'd like to get it right. Thanks.

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Replies:

Posted By: kreg357
Date Posted: December 13, 2015 at 4:57 PM

Here is a link to the DiectFax 1041 document :  https://www.the12volt.com/installbay/file.asp?ID=1213

Lots of good info.  Reverse polarity is also known as Type c.



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Soldering is fun!


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