Which Wire?

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=28723
Printed Date: June 21, 2025 at 5:35 PM

Topic: Which Wire?

Posted By: kelpike
Subject: Which Wire?
Date Posted: March 20, 2004 at 2:26 PM

I'm trying to get my Python 1500 ESP working in my truck. I found a couple of cut wires.The violet(+)door trigger input zone 3 and the green(-)door trigger input zone 3 were cut. According to the full size Blazer wire chart which I got on a link from here. The chart says the wire is white with - polarity and is in the headlight switch. Why would it be in the haedlight swith. And the chart only mentions 1 wire. How do I know if my vehicle has a negative trigger circuit or a positive switched dome light circuit? The DEI installation manual says connect the green to a wire that shows ground when any door is opened, and connect the voilet to a wire that shows (+)12v when any door is opened and ground when closed. To add the the mix my truck has a on off switch on the dash for the door activated interior lights. I am completely confused. Please help.

Replies:

Posted By: zargon
Date Posted: March 20, 2004 at 2:40 PM

what year blazier is it? to test for negitive triger the wire will have positive 12volts on it with dor shut and will show o 12+ when open, many cars will have door triger at the headlight switch because your dome light circut is at that location also.

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zargon ruler of estranorth

Posted By: kelpike
Date Posted: March 20, 2004 at 2:55 PM

94. I cant tell if I'm supposed to use on or two wires.

Posted By: draasch
Date Posted: March 20, 2004 at 5:47 PM

Make: Chevrolet
Model: Blazer - Full
Year: 1988-94

Alarm
Constant 12 volts RED AND RED IGNITION SWITCH HARN.(BOTH 1 CIRCUIT)
Ignition 12 volts PINK IGNITION SWITCH HARNESS
Starter PURPLE AUTOMATIC TRANS YELLOW - MANUAL TRANSMISSION
Dome Light WHITE (-) PIN SWITCH OR AT COURTESY LIGHT
Trunk Pin Switch WHITE (-) AT PIN SWITCH
Parking Lamp BROWN (+) AT HEADLIGHT SWITCH
Power Lock LIGHT BLUE DRIVER KICK PANEL OR #203
Power Unlock BLACK/ WHITE OR BLK/RED BELOW DRIVER SPEAKER

#203- See Reversal Rest At Ground Door Lock Diagram.

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Good Luck
David
Ace Security
813-376-9778
Tampa
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