Unlock Wire (99 Grand Am)

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=26251
Printed Date: September 08, 2025 at 2:49 PM

Topic: Unlock Wire (99 Grand Am)

Posted By: Trav3D1
Subject: Unlock Wire (99 Grand Am)
Date Posted: February 10, 2004 at 10:32 PM

I recently installed a Prestige APS-25CH in a 1999 Pontiac Grand Am. I have located the single (white) power lock and unlock wire and installed a 1.5 K ohm resistor on the unlock wire as required. I am still having problems with the unlock function of the alarm.

Does the unlock wire need a double ground pulse? Any suggestions

In addition, any information on the door triggers would be helpful also. (i.e. wire color, location, and installation specs.)

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Trav

Replies:

Posted By: ccroadshop99031
Date Posted: February 10, 2004 at 10:36 PM

is it 1.5. or 15k id dubble check

Posted By: Trav3D1
Date Posted: February 10, 2004 at 10:45 PM

Here's the resistor color (4 band) code that I was using from right to left.

Brown, Green, Red, Gold = 1.5K

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Trav

Posted By: mobiletoys2002
Date Posted: February 10, 2004 at 10:59 PM

did you use relays??? If not use them this sytem cannot be hooked up directly withouit relays tehy are negative but need a high current ground to work!!! the unlock requires a 1.5k ohm resistor !

Posted By: sroth140
Date Posted: February 11, 2004 at 12:51 AM

you have to use relays. its a one wire door lock system.

Posted By: Trav3D1
Date Posted: February 11, 2004 at 6:38 AM

I have the lock wire hooked up directly, and it works fine. Will only the unlock wire require the relay? and if so is there a particular wire spec. I should follow or should the traditional "actuator" specs with the resistor added work just fine?

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Trav

Posted By: mobiletoys2002
Date Posted: February 11, 2004 at 8:36 AM

wire your relays as follows take the negative output from the alarm for lock put that on pin 85, take 12 volts positive (depending on alarm the unit may have this in the door lock harness)and put on in 86.

Pin 87 will get ground, pin 30 will go to the white wire in the car.

You do the same thing for unlock but this time place the resistor on the wire at pin 30!!!