Nissan 240SX Single Wire Door Lock System?

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=3081
Printed Date: December 14, 2025 at 3:46 AM

Topic: Nissan 240SX Single Wire Door Lock System?

Posted By: Nismo240
Subject: Nissan 240SX Single Wire Door Lock System?
Date Posted: August 26, 2002 at 12:57 PM

If anyone has any info on how to fix this I'd be very appreciative:

Nissan 240sx Single wire system ( ground to unlock)

Brand new relay that I'm sure is working

The power door locks will not unlock when the alarm is disarmed nor will they unlock in response to channel two, tried going through the setup again, no luck. But The doors WILL lock 3 seconds after the ignition is turned on, just like they're supposed to . So, I know that the alarm cp can at least send the lock pulse to the relay, but the unlock just doesnt seem to work, as far as i can tell the alarms ground is good, what else can i check?

Replies:

Posted By: cpgoose
Date Posted: August 26, 2002 at 1:34 PM

Does the module at least "click" when you try to unlock it?

Can you probe the unlock wire, and see if it shows ground when you unlock it?

Just a couple things to narrow down what could be broken.

Posted By: Mr King
Date Posted: August 27, 2002 at 11:37 PM

If you check the Nissan one wire lock relay design on this websight it show that you how to wire this right with two relays , and if you are using two , that will show you what all the wire values need to be so you can check them all with your DMM .

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Sir