trailblazer locks without 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=43156
Printed Date: July 18, 2025 at 8:14 PM
Topic: trailblazer locks without module
Posted By: misterjimbo
Subject: trailblazer locks without module
Date Posted: November 16, 2004 at 8:44 PM
i have done 25 to 30 trailblazers with no problems, until now. the vehicle does not get along with lock module. check previous post for more info. i think i am going to hardwire the locks with relays, any tips? it will be my first time.
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Replies:
Posted By: jrilla
Date Posted: November 16, 2004 at 8:59 PM
Well you need to go into both drivers and passengers doors and do reverse polarity on each, then for the back doors you need to go under the seat and send a negative pulse to pin 85 on each relay that you will find there Then go into the hatch and wire the wires there for reverse polarity.
I recommend a different interface module.
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J Rilla
Owner/Installer
Posted By: ninjazx6e
Date Posted: November 16, 2004 at 9:06 PM
if you are feeling ambitious you can take the drivers door module apart and solder wires into the lock switch itself and use 2 relays to mimick the switch, I have done this several times and have never had a problem with it.
hook common post of switch to pin 87 on both relays and hook the unlock post on the switch to one of the relays(pin 30) and same for the lock post then just use your lock wires from the alarm to trigger the relays, it sounds a lot more complicated than it actually is, really not to hard.
Good Luck
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