00 chrysler town and country
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=69943
Printed Date: September 20, 2025 at 9:39 PM
Topic: 00 chrysler town and country
Posted By: northern
Subject: 00 chrysler town and country
Date Posted: January 03, 2006 at 2:30 PM
Did a search on this, all the info seems to be the same... Im trying to do door locks on this, I am on the left connector below the bcm, WHITE/ green wire on the left side of the plug, I probed it, looks like around 5 or 6 volts, Now my problem is I tried the following resitors on it, 1.5k, 280 ohms, 680ohms, none of these did anything?
It does have factory alarm.
Replies:
Posted By: sparkie
Date Posted: January 03, 2006 at 3:24 PM
You need a ground pulse through a 620 ohm resistor to disarm/unlock and a 4020 ohm resistor to arm/lock. You can use resistors within 5% value. You MUST use relays to insure a good ground signal through the resistor.
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sparky
Posted By: northern
Date Posted: January 03, 2006 at 3:59 PM
500 mA ground should be enough with out a relay? Wouldn't it?
Posted By: russ lund
Date Posted: January 03, 2006 at 5:06 PM
The current isn't the problem.If your R/S has transistor outputs If might not ground down properly.
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BigDog
Posted By: northern
Date Posted: January 03, 2006 at 5:58 PM
Maybe I have the wrong wire, It doesn't seem to go to ground when I test it with a DMM, It sticks around 5 or 6 volts. Should this wire show some fluctuation with the press of the unlock/lock with the door buttons, or the keyless remote?
I am using the far WHITE/ green wire on the opposite side of the BLACK/ white wire. I am using astrochart and autosoft (autostart) for wiring references) but I also checked it with a dmm?
Posted By: tampa77
Date Posted: January 03, 2006 at 9:14 PM
Since this is a multiplex system I believ that the voltage will not drop, as it would on a postive A system door lock. Does it have a factory alarm, if so the resistance may be different, one of my data sheets read: w/ Alarm
Lock: 665 Ohm
Unlock: 4020 Ohm w/ out Alarm:
Lock: 250 Ohm
Unlock: 1500 Ohm Wire is WHITE/ Green @ left plug, bottom of fuse box/BCM. Easisest way to test this would be to hook a resistor to the wire (when you are sure you have the correct one, you can add a 5AMP fuse inline for good measure) and ground the wire to the frame and you should get unlock and lock, then once the resistance is correct hook up to a relay, always use a relay with multiplex unless the system has one such as a 451M. Best of luck. Tampa77
Posted By: xtremca2003
Date Posted: January 03, 2006 at 9:36 PM
You will need to use relays if your main unit has door lock outputs that can be swithed from pos to neg. (or as stated above transitor outputs). The reason is that when one go's to ground, the other goes +12volts. Also the ground is not a very strong ground.
Chris
Posted By: sparkie
Date Posted: January 04, 2006 at 2:49 PM
The 500ma rating is the current limit that the output can handle. Transistorized outputs do not give a perfect ground out so adding an inline resistor without the use of a relay will only add to the resistance value. Multi-plexing requires either a perfect ground or 12 volts to work correctly. It sounds like you are on the correct wire but you are not activating the circuit correctly unless the resistance to ground is what the vehicle is looking for. Try using a jumper wire from a good ground through the resistor onto the WHITE/ light green wire to confirm this. The correct wire is more to the center of the plug closest to the drivers side of the vehicle. You usually have to remove the other plug to get to it as it is jammed above the inner whell well. Look at the graphics from Autostart to see how to wire up the relays.
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sparky
Posted By: northern
Date Posted: January 06, 2006 at 8:37 PM
Ahhh, i tried grounding the wire with the different values of resistors with no luck, I will try to use a relay and see if that gives the correct ground, I grounded the wire directly with a resitor to a good chassis ground. The outputs from the autostart does not go positive or negative, they are seperate wires for negative or positive door locks.
Posted By: northern
Date Posted: January 06, 2006 at 8:48 PM
Its got a factory alarm, so should I hook just the lock and unlock wires up to the WHITE/ green wire? Normally I setup the autostart to give 1 pulse for disarm factory alarm, second pulse to unlock. So technically speaking I should be able to hook up my brown and green through relays/resitors to the WHITE/ green wire without using the arm/disarm wires from the autostart? This is the info im using *Doorlocks are Multiplexed:
Without OEM Alarm:
Ground (-) through a 250 Ohm resistor for Unlock
Ground (-) through a 1500 Ohm resistorfor Lock
With OEM Alarm:
Ground (-) through a 665 Ohm resistor for Unlock & Disarm
Ground (-) through a 4020 Ohm resistor for Lock & Arm
Posted By: robdog1969
Date Posted: January 07, 2006 at 5:20 AM
you dont need any of that if you go to the relays in front of the fuse box..... just solder to the leg of neg input ....their maybe a seporate relay just for Dr. door unlock , doide isolate it.... this saved me in a pinch on the road one time.....
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over 20 years of experience in the 12 volt industry
Posted By: sparkie
Date Posted: January 07, 2006 at 10:51 AM
Use the WHITE/ red wire with resistors and relays. The advantage to this is that if any door is still open when you hit the remote's lock button, the vehicle's BCM will lock all the doors after all are closed. The wire tap into the relay method won't. The resistor method usually illuminates the interior light on unlock too.
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sparky
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