Problem With Alarm Door lock

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=1034
Printed Date: July 15, 2025 at 3:08 AM

Topic: Problem With Alarm Door lock

Posted By: i4u2cravei
Subject: Problem With Alarm Door lock
Date Posted: May 30, 2002 at 8:21 AM

Need some advise on power door locks on a 1996 town and country minivan i got it lock part too work with a 1.5 ohm Resistor on the alarm but i cant get the unlock too work i even use the 249ohm Resistor but i wanna know if the ground is not enought and if i need too use any relays to step up the ground please email me back if any can

Replies:

Posted By: Big Dog
Date Posted: May 30, 2002 at 9:20 AM

Hey i4u2cravei,

The selected resistor values are correct if you don't have a factory alarm on this van. If there is an alarm then it's a 4020 ohm for lock and a 665 for unlock. In either case you MUST USE RELAYS for lock and unlock. An alarm module sends a negative pulse through transistors but it's not a true ground pulse. posted_image

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