does our cars have a timed rear defrost that only last about 30 sec. to a min. b/c when i push the button it will light up and work but I'll look down a min. later and it's kicked off...is the car set up like this....this has been bugging me for a long time and was wondering the answer b/c i can keep my wife's car on from now on and it doesn't kick off

 

I know mine doesn't kick off at all. I always have to check it and turn it off.

 

From the owner's manual (nobody reads those, right? ) :
Sometimes the breaker for the defogger will get tired. It tried replacing mine with a new one, but a 30A fuse restored the function to normal. This is a very common question, but most posts are in the fall when the weather firsts turn cold. Apparently, the search function does not get over-taxed on this subject.

 

thanks alot guys yeah should read the manual huh? but it doesn't stay on 10 min. at all maybe 3ish that's it so you think i need to replace the fuse even if it's not broke???

 

That would be my suggestion.

 

Sweet, I'm going to replace mine tomorrow with a 30a fuse... I was just cursing it this morning My defroster has been like that every since I bought the car. I knew it wasn't supposed to cut off after a minute or two but didn't realize it was that easy to fix.

With mine... I can turn it on and it'll stay on for maybe a minute then shut off and it wouldn't come back on for several minutes afterwards. I can press the button immediately after it shuts off and it won't light up to show its activated... but if I wait about 5 minutes before I try, then it'll come on for another minute or two and shut off.

It's going to be awful nice to actually have a rear window that I can see out of before I get to the parking lot at work

 

the fuse mod worked great for me. Mine only lasted like 3 mins at most. I put a fuse in place of the circuit breaker, and mine lasted the whole 9-10 min cycle.

 

so just use a plain ol' 30 amp fuse in its place....is it right beside the drivers air port or under the hood

 

It's in the dash fuse panel.

 

Um, could something in the wiring/defroster grid be causing the breaker to pop early? Just a thought. Mine stays parked for the cold weather so i don't ever need the defroster.

 

It could be from increase resistance in the circuit, but it's too easy a fix to swap a fuse in.