2003 mustang door locks don’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=119220
Printed Date: May 10, 2025 at 7:26 AM

Topic: 2003 mustang door locks don’t work

Posted By: stangfever2846
Subject: 2003 mustang door locks don’t work
Date Posted: January 10, 2010 at 12:37 AM

I have a 2003 mustang mach 1 5-spd with power door locks and keyless entry. I installed a viper 5002 alarm and my door locks don't lock and unlock with the alarm remote. They work fine with the door lock button and with the oem keyless entry remote. I wired them using the diagram c (directly-wired reversing-polarity switch circuits) from the viper manual. The 5002 alarm comes with built in door lock relays so I cut the factory light green door lock wire and connected the ground side to 87A and the motor side to 30. I did the same to the factory purple door unlock wire. 87 on both relays went to +12v constant. Is this correct? On the viper website it said that I needed a PKFM PATS override module. I haven't connected this yet because I don't plan on using remote start(5 spd car). Do I still need to connect this module? Will this module fix my door lock problems or is there some door lock specific module that I need to buy to remedy my situation?

Thanks in advance!

Replies:

Posted By: 05gt
Date Posted: January 10, 2010 at 12:58 AM

this module will not fix you doorlock issue

your car is postive doorlocks ,you shouldn't be cutting anything

violet and violet/black to fused 12 volts, GREEN/ black to your lock wire in the car and blue/black to your unlock wire in the car

Posted By: stangfever2846
Date Posted: January 10, 2010 at 1:36 AM

Thank you for the quick response. Leave it to me to make things more complicated than what they really are! So then I don't need to install the PATS override module at all?

Posted By: 05gt
Date Posted: January 10, 2010 at 9:15 PM

the pats module will only be used to remote start this car, it does nothing else

Posted By: stangfever2846
Date Posted: January 11, 2010 at 5:53 PM

Thanks for the help with the door locks, they work great now.! Also I guess i'll be putting the PATS module up for sale on ebay since I have no use for it.