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Rear Defroster: fffuuuuuuu

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Old 11-18-2010, 06:19 PM
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Default Rear Defroster: fffuuuuuuu

My rear defroster will cut on but it doesn't stay on long enough to melt the frost on the hatch glass. Sometimes it doesn't even stay on for a full minute. It won't let me cut it back on for a while after it turns off either. This isn't so bad right now, but as it gets colder I am really going to need it to work right. Any ideas why it cuts off early? Thanks.
Old 11-18-2010, 06:30 PM
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mine has that same problem. im having it looked at now. does it also cause your power seat not to work like mine?
Old 11-18-2010, 06:51 PM
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Ok, so I'm not just inadvertently smoking lots of crack in the spare time I can't seem to remember.

Mine does the same thing, but I just thought I was imagining things, and I just keep pushing the button until it's fully defrosted. Maybe there is some kind of damn timer **** behind the switch panel like on a toaster? LOL, no, no, no, my tint is not brown yet, who messed with my settings!?
Old 11-18-2010, 07:28 PM
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mine wont go back on for a few minutes. major PITA.
Old 11-18-2010, 08:13 PM
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Sounds like we're all in the same boat guys lol. I haven't noticed my seat not working but I rarely move it. I am so sick of pushing that button over and over and over and it not working most of the time.
Old 11-18-2010, 10:40 PM
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Seat Problem X2
Defroster X2 (anything to do with my super dark tint?)
Old 11-18-2010, 10:55 PM
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Check your grids on the window. Maybe some are missing from when tint was removed before
Old 11-19-2010, 03:40 AM
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The solution to this problem I thought was super common and well known. Guess not.

Here's the deal. Instead of fusing the circuit, GM put in a self-resetting circuit breaker instead. Its only supposed to trip off if it senses a short circuit. As they age, they start to not function properly and cut off too early. After they cool, they reset and begin working again. The solution to this problem is the pull the little silver case from your fuse box and replace it with a 30 amp blade fuse. Problem fixed.
Old 11-19-2010, 08:55 AM
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Originally Posted by 01ssreda4
The solution to this problem I thought was super common and well known. Guess not.

Here's the deal. Instead of fusing the circuit, GM put in a self-resetting circuit breaker instead. Its only supposed to trip off if it senses a short circuit. As they age, they start to not function properly and cut off too early. After they cool, they reset and begin working again. The solution to this problem is the pull the little silver case from your fuse box and replace it with a 30 amp blade fuse. Problem fixed.
Correct, although I'd recommend putting in a new circuit breaker. (Even though a fuse will "last longer.") The fuse is faster acting, so there is a chance it could blow if you get a normal power spike when turning on the defroster or moving the seat. Here's a really good thread on the topic:

https://ls1tech.com/forums/stereo-el...er-switch.html
Old 11-19-2010, 10:05 AM
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Old 11-19-2010, 11:51 AM
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I've tried a new breaker - it didn't help.
I replaced the breaker with a 30 amp fuse, as mentioned above, and it has been fine for years.
Old 11-19-2010, 12:19 PM
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HAH! Very nice and much appreciated! Trying this tonight.
Old 11-20-2010, 06:11 AM
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Originally Posted by pjb
I've tried a new breaker - it didn't help.
I replaced the breaker with a 30 amp fuse, as mentioned above, and it has been fine for years.
X3

5 years now...cured.
Old 11-22-2010, 06:06 PM
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As mentioned previously, just put a fuse in... don't even bother replacing the breaker bc it will continue to do the same thing.



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