Viper Alarm Door Lock Problem
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=42936
Printed Date: June 10, 2024 at 1:47 PM
Topic: Viper Alarm Door Lock Problem
Posted By: schiebem
Subject: Viper Alarm Door Lock Problem
Date Posted: November 13, 2004 at 11:50 PM
Hello, I just installed a 791 VX in my 97 Caravan. All works great except doors do not unlock when I disable alarm. Locking works fine... It is a problem with the output of the alarm I think. I cut the blue and green wires between the resistors and the alarm unit, and touch each one to ground and doors lock and unlock fine. It appears the ground is not coming from the unit to unlock during disarm. Is there a programming option that may be dorked, or am I missing something here? Thanks in advance for your assistance
Replies:
Posted By: profuse007
Date Posted: November 13, 2004 at 11:55 PM
| POWER LOCK|WHITE/ green |*2 |left plug at bottom of fuse |
| POWER UNLOCK|same wire |*2 |box under cover (1 of 3) |
*2Use relays and set up for negative trigger. Place a 4020 ohm resistor inline on the lock output, and a 665 ohm resistor inline on the unlock output. If you do not have a factory security system use a 1500 ohm for lock and a 250 ohm for unlock.
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: schiebem
Date Posted: November 14, 2004 at 12:00 AM
I have it setup with the wires connected to the WHITE/ green through the 250 and 1500 ohm resistors. Lock works great, but unlock no dice. When I unhook from the alarm unit and touch each wire to ground, they both work...
Posted By: auex
Date Posted: November 14, 2004 at 12:02 AM
Are you using relays? If not then this is the problem. You cannot use the wires directly off the alarm. You are lucky that lock is working.
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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: schiebem
Date Posted: November 14, 2004 at 12:09 AM
I shouldn't need a relay, I think... The alarm connects through the resistors to the mux input of the body control module, which controls the door lock relay... The body control module shouldn't draw more than the 200mA limit of the alarm door lock output should it?
Posted By: auex
Date Posted: November 14, 2004 at 12:11 AM
OK, I am telling you that you NEED relays. Like I said you are lucky that the Lock works.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: schiebem
Date Posted: November 14, 2004 at 12:13 AM
OK, Enough said... I will pick a couple up and install tomorrow. Thank you very much for the help. Mike
Posted By: auex
Date Posted: November 14, 2004 at 12:16 AM
Relays will take care of the problem.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
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