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santa fe rear defroster

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=24325
Printed Date: June 05, 2025 at 5:40 AM


Topic: santa fe rear defroster

Posted By: jebstuart
Subject: santa fe rear defroster
Date Posted: January 10, 2004 at 3:46 PM

Has anyone connected rear defroster on 2003 hyundai sf  to aux channel of remote start.  I haven't found any defrost wire in diagrams listed 



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Jeb Stuart



Replies:

Posted By: sparkie
Date Posted: January 10, 2004 at 4:45 PM
Anytime I have tried this I simply used the remote starter's output to trigger a relay. The relay is hooked up to the rear defogger's switch contacts. You may have to disassemble the climate controls to get to the switch contacts depending on where it is mounted. This is usually the best way to do it as there are usually thermostats and or timers involved with the factory system.

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sparky



Posted By: brunetmj
Date Posted: January 10, 2004 at 5:29 PM
To just add a little here usually the defroster needs a pulsed ground not a constant. This simulates the defroster button being pushed.This allows the car defroster timer to work as it normally would. Now you need to know two things. Which wire on the defoster switch needs the ground and which wire on the remote can give it a pulsed ground.For the first problem you may need to get a wiring diagram or do some wire testing.For the second you need to read the literature for the remote involved.



Posted By: jrilla
Date Posted: January 10, 2004 at 6:06 PM
Pin 85 at the blue relay in the fuse box. That would require a constant output though I am sure since you are going to the relay. That is the info I have on it.

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J Rilla

Owner/Installer


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