03 impala rear defrost 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=50894
Printed Date: June 22, 2025 at 1:17 PM
Topic: 03 impala rear defrost wire
Posted By: specter
Subject: 03 impala rear defrost wire
Date Posted: February 26, 2005 at 9:40 AM
i need a wire to hit to trigger the rear defrost on remote start, either at the bcm or the back of the temp controller.
Replies:
Posted By: KarTuneMan
Date Posted: February 26, 2005 at 12:46 PM
The astrochart shows a white(-)NEG at the harness behind the switch. What is NOT given, is pulse or latched....?
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Posted By: specter
Date Posted: February 27, 2005 at 8:43 PM
so the harness behind the temp control?? i'm gonna assume it's a pulse as there are only four buttons on the control, and atleast 8wires on the harness, so i'm thinking to rest are for the led on the control. anyone else know for sure??
Posted By: specter
Date Posted: February 28, 2005 at 6:10 PM
not a negative trigger to the white or WHITE/ black, any other idea's??
Posted By: specter
Date Posted: March 01, 2005 at 6:18 PM
turns out it is related to the white wire behind the temp control, but it seems the wire has a 12volt feed when the defogger is off, and goes to about 1-2volts when it's on. i can't think of a way to work a relay to turn that one with a negative pulse, or if a pulse will even work (alarm can do a 5min latch, but the cars switch runs it for about 15min, which is much better)
Posted By: specter
Date Posted: March 08, 2005 at 7:30 PM
problem solved, ended up soldering a wire to the button switch in the temp control. needs a +12v pulse to trigger the rear defrost. email me if you want pics or need to know how to do it. defyreality@sonicbliss.ca
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