rear defrost chevy malibu

   I just installed an alarm with remote start and keyless entry. I have a few extra channels and I want to turn on the rear defrost. can I do this.? 

 also can I make it to where I can leave the driver window opened and croll it up with the alarm?  thanks     kenneth

Test the wire that goes to the defroster button, it will be either (-) or (+).  Use a relay to supply the proper trigger to the wire you find and use the same value to the defroster.  Makesure you fuse the value that is going to the factory defroster.  I recommend using a channel that you can use to pulse or latched whenever you need to turn the defroster on or else you will have the defroster coming on in the summer months. 

On the window part, you will need a mod for that....try dei

OK, first off I found the wire that the rear defrost grounds to turn on the defrost but grounding it only momentaraly turned on the defrost. the timer is electronics inside the climate control unit.  I had to take it apart and solder wires to both sides of the micro switch.then run them to a relay. now it works great.

        on the windows both sides of the motor rest at ground. I cut the one that  gets 12 volts when the window goes up and put the normaly closed side of a relay between them. then I put 12 volts to 86 and 87. and the alarm grounds 85. now I can leave my driver window down and remote put it up. it works great.

          I just thout you may want to know before buying a (mod)..........

How does it know when to stop?  or are u watching and releasing the channel as it reach the top?  just curious.

kbleu2, when you soldered the two wires to the climate control unit, how did you wire the relay?  I'm thinking about trying this with a 2001 bonneville and I'm wondering how difficult it is.