Raleigh TA

iTrader: (13)

Not sure if this is the right forum, but... My rear window defroster is malfunctioning. When I hit the button on my 99 TA, it lights and stays lit for about 20 seconds, then goes out. The rear window defroster seems to work for that short period, and won't come back on for a few minutes, and then repeats. Seems like it may be like the circuit that people have trouble with on the window motors that heats up. Anyone have any fix ideas?

joecar

Try changing the DEFOG/SEATS circuit breaker (located in fuse panel at far LHS of dash).

JOHNNY59

iTrader: (398)

problem with the timer board inside the HVAC control panel. Can be replace with another timer board.

kyleholt11

iTrader: (3)

I just put a fuse in mine to fix the problem. It works like a charm!

Raleigh TA

iTrader: (13)

30A. Not a fuse I keep around. I will grab one and give it a try. Thanks.

Grimes

iTrader: (3)

Weird, mine does this, but it stays on for probably a minute. I always thought it was a safety thing, not letting it run for too long. how long should the rear defroster run for?

autogeek23

iTrader: (13)

I've heard It's the circuit breaker. Mine fire the same thing

Krab

iTrader: (28)

Same problem here. Usually stays on for about a minute too then shuts off.

Raleigh TA

iTrader: (13)

So I replaced the 30A fuse this afternoon and ran the defroster for a while. Seemed to run longer, I haven't had a chance to try it with actual frost yet. I'll update when I get a chance to see how it works.

kyleholt11

iTrader: (3)

Yea mine would stay on for 25 seconds then the circuit breaker would overheat and kill both my rear defroster and power seats. After I replaced it with a 30a fuse the problem with that stopped for good. Hope it works for you guys like it worked for me

Grimes

iTrader: (3)

Great tips, thanks guys.

Raleigh TA

iTrader: (13)

Can't argue with a fix under $4! Working fine this morning! Thanks guys.

Raleigh TA

iTrader: (13)

Well, it worked one day, now it won't even come on at all. Back to the store for another fuse.

joecar

That's why you need a new circuit breaker instead of a fuse.

Raleigh TA

iTrader: (13)

I used a circuit breaker, may try to put the old one back in. I wonder if my seat control harness may be wet or shorted? I am using aftermarket seats.

kyleholt11

iTrader: (3)

I also used new circuit breakers and they didn't work... The fuse works great... I've been using the fuse for over a year now.

99wssixm6

iTrader: (3)

I have had the defroster problem for a few years now but living in Florida it isnt a big deal. However i needed it Monday as we had a 30 degree morning here in Orlando(current temp of 85) and my seats quit working. I was so pissed I could have ripped the steering wheel off. A minute later the seats started working.

Glad I found this post.

kyleholt11

iTrader: (3)

Yep that's Because the power seats and rear defroster are on the same circuit

Raleigh TA

iTrader: (13)

With the mornings getting a bit warmer, there are less opportunities to test the defroster. After replacing the breaker with another breaker and blowing that, I tried kyleholt11's advice and grabbed a 30A fuse. The result has been perfect performance on the three mornings I have tried.

kyleholt11

iTrader: (3)

that's good to hear bud! Glad i could help.