how to bypass mazda’s door lock module?
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=128175
Printed Date: May 15, 2025 at 3:31 PM
Topic: how to bypass mazda’s door lock module?
Posted By: tzagi
Subject: how to bypass mazda’s door lock module?
Date Posted: August 07, 2011 at 11:59 PM
Here is the situation.
I'm working with a 2000 mazda MPV and would like to bypass the entire door lock module
Problem: The door lock switches (at the doors) close to ground one way and to ground thru a 2.4 k resistor the other, (for lock and unlock)
What could be built that will separate between the 2 signals and will allow the use of a standard 3 relay system?
Replies:
Posted By: t&t tech
Date Posted: August 08, 2011 at 6:30 AM
Locate the module and you find the common motor wires, remove them and wire them with your relays or five wire them so that the original switches work, one question, why?
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Posted By: howie ll
Date Posted: August 08, 2011 at 6:46 AM
x 2 With T&T, incidentally with a 2 wire lock system you will still need 2 relays. Most two wires don't put out enough current to overcome the resistor.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: tzagi
Date Posted: August 08, 2011 at 5:36 PM
t&t tech wrote:
Locate the module and you find the common motor wires, remove them and wire them with your relays or five wire them so that the original switches work, one question, why?
That's how its hooked right now to an aftermarket alarm, problem is...the original lock-unlock switches don't work, (the factory lock module is MIA)
I'm looking for a way to incorporate the original lock switches into the system without using the factory lock module.
Posted By: howie ll
Date Posted: August 08, 2011 at 5:39 PM
You have to find the factory wiring diagram. Or first make the switches work. Did they work before the alarm was installed?
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: August 08, 2011 at 5:41 PM
How do you mean MIA? Not there or not working. If the second, start checking your fuses.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: tzagi
Date Posted: August 08, 2011 at 11:09 PM
MIA as in missing in action,
I'm guessing it went bad (in the past) and was replaced with an after market alarm/keyless entry, problem is due to the way the one wire switches work, they are not compatible with a standard system (not without the factory module anyway) I'm trying to find a way to make them work.
Posted By: howie ll
Date Posted: August 09, 2011 at 12:21 AM
How many wires coming off of each switch?
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: tzagi
Date Posted: August 09, 2011 at 3:58 PM
2 wires,
1 goes to ground, the other is the sensor wire, the lock position grounds the wire, the unlock position grounds the wire via a 2.4K resistor.
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