It just snowed here in NM the other day and the temperatures have crept well below freezing and I figured that it was time to try out the rear defroster. And, guess what, it doesn't work! I have to wait for at least half an hour before the interior of the truck warms up enough to defrost it. The wierd thing is though, the side windows defrost just fine. I haven't really had a chance to figure out what the problem is, but I thought I would see if anyone had any ideas.

 

Anyone?

 

Mine doesn't work either, never really cared enough to fix it. I just roll the back window down when backing up. Taking the tail gate apart would be my first step though.

 

Check the wires that goes up and down with the rear glass.
I think you will find it is broken in two from the fatigue of going up & down.
Solder, retape and you'll be back in business.

 

The exact thing happened to mine around 140,000k. I used to roll my window up and down all the time.

 

Hey thanks guys. I'll get right on it.

 

Astralplane nailed it. There's a little wire that connects to the bottom of your rear window glass.

I have a 94 4Runner disassembled right now. I can take pictures if you have any trouble. pm me if you need help.

 

who cares about the rear. ever since i tinted my windows i rarely look out of it (unless backing up)....

 

Thanks! I will if i need anything

 

Finally fixed it. The little wire on the bottom of the glass had broken off. I re-attached it and it works good as new!