2001 pontiac grand am locks with 451m
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=129757
Printed Date: May 14, 2025 at 1:21 AM
Topic: 2001 pontiac grand am locks with 451m
Posted By: JIMMY 2 TIMES
Subject: 2001 pontiac grand am locks with 451m
Date Posted: December 19, 2011 at 12:31 PM
i just did rs on a 2001 grand am. everything is working fine except for the door lock/unlock
i used a 451m with the 1500ohm resitor, and it doesnt lock or unlock
my 451 m is wired up like this
purple to ground
WHITE/ black cut off
BROWN / black cut off
blue and green to the white wire in the car (with the resitor)
I verified the correct resistance, but no unlock
I have read others used different resitors, how would i determine if in need another value?
Replies:
Posted By: kreg357
Date Posted: December 19, 2011 at 1:20 PM
Verify you have the correct White wire in the Black plug in the Driver Kick Panel. After verification, a quick test is to just apply a straight chassis ground with a jumper to this White wire. The doors should lock. Do the same with the jumper and a 1.5K ohm resistor on the end of it. The doors should unlock.
Your wiring on the DEI 451M outputs looks OK. Can you hear / feel the 451M relays click. Check the 15A fuse and chassis ground to the Purple wire and that the Red wire in the 3 Pin white plug is getting +12V.
------------- Soldering is fun!
Posted By: JIMMY 2 TIMES
Date Posted: December 19, 2011 at 2:06 PM
yes, i tested the wire to ground and it locked, just not unlock.
Posted By: offroadzj
Date Posted: December 19, 2011 at 2:50 PM
I have had numerous cars where the resistance was incorrectly listed. I would either try a few different resistances and see if you find one that works; or test for the correct resistance on the wire while unlocking.
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Kenny
Owner / Technician
KKD Garage LLC
Albany, NY 12205
Posted By: kreg357
Date Posted: December 19, 2011 at 2:54 PM
For a very comprehensive guide on door lock systems, go to the Downloads section and search on DF1041. Page 10 has the info for your Type H (-) Door Locks. They detail how to determine the correct resistor value required. ------------- Soldering is fun!
Posted By: howie ll
Date Posted: December 19, 2011 at 4:02 PM
Has the poster made sure the resistor is only on the blue wire, I read the first post as wires joined, then the resistor.????
This morning my pants belt broke, I spilled my tea all over my desk and 2 trips to my local supermarket to get one working wireless mouse, oh and lost out on $600 worth of profit!*
So no stupids please this week.
*People getting big ideas then realising they can't afford it.
Do you know 5102 and 5202 DEI products, one way and two way are $75 apart TRADE here?
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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.
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