Rear Defrost

[anikin8421]

Hi guys change the temp gages and still no go rear defrost lights up not werking .

Anyone had this be for????. Also thanks for the heads up on the fan motor reststor I only have the last two speeds as well.


;)

[ptrudel]

mine don't work either...i dunno what it is tho...im pretty sure my switch is dead tho

off topic a lil, wheres aylmer?

[anikin8421]

in Quebec Anyone eles know about this problem

Dude what do you do in the Winter to clear the back window

[bdyman]

did ya check all fuses?? relay`s??
sometimes if the lines are scratched it won`t work

[ptrudel]

ah, now i get the PM... :lol: ...all i do is scratch it like the windshield...and keep the heat up...which i do anyways in -40degree weather...

[Redog]

Are the plugs in the grid? If not they will have to be sodered back in

[3.4 Euro Alero]

Not the first thing I would check, but I was online with Haynes at my garage and there is a regulator box(I can't remember the proper name) in I believe the right rear pillar. This unit controls the rear defroster and has the antenae wiring going through it as well. I believe your stereo reception would not be up to par if their is in fact an issue with it, but with so much power going through it, my tech has replaced a half a dozen of them in the past year 'cause they melt. Really stupid design! Something else to check out.

[misslindseysue]

^Yeah. It's on the passenger side C pillar. Antenna booster and defroster are in the same little module. The part at the dealer is $103.

[3.4 Euro Alero]

Originally posted by misslindseysue@Sep 29 2004, 09:20 AM
^Yeah. It's on the passenger side C pillar. Antenna booster and defroster are in the same little module. The part at the dealer is $103.
Thanks. I couldn't quite remember what side as I read the info last winter and haven't had to replace one yet.

[ptrudel]

i've lived without a radio for the last year and a half...if its that stupid little module, i'll live without a defroster too...i ain't payin that much just so i can "see" out of my window <_<

[misslindseysue]

Yeah, I didn't buy it either. We went to the parts counter and asked and said "Ok, thanks, bye."

[3.4 Euro Alero]

Originally posted by 2000_olds_alero@Sep 29 2004, 01:38 PM
...i ain't payin that much just so i can "see" out of my window <_<
Yeah, seeing out of your vehicle is a little overrated! :lol:

[dbailey]

My rear defroster stopped working but the radio is fine. Not sure how to check the rely under the hood to see if that is what went bad. Any ideas? :huh:

[misslindseysue]

Look in your owner's manual to find out which relay it is. Then get a friend to help you out. Have them push the button on and off, and listen to see if you can hear the relay clicking on.
Mine stopped working last winter, and I just had to wiggle the plugs at that module in the C pillar. Make sure the grid is plugged in on the back window, too.

[dbailey]

Ah ha. I pulled the relay out of the box under the hood and plugged it back in. Do you have to take the trim piece off of the rear pillar to access the part you are talking aobut? Thanks. ;)

[dbailey]

:thumbsup: Checked the relay and its clickin. The fuse in the same box is also good. Now what???? The do hicky in the rear pillar? Thanks.

[misslindseysue]

Yup, if you made sure the grid was plugged in still. I don't remember what all you have to take off to get to it. It's a lot of carefull pulling. Just have a look at it and start pulling off the plastic that seems to be in your way.

[dbailey]

:huh: Anybody else having the rear defroster not working problem? How do you pull the plastic cover off of the rear pillar without breaking it? I guess that's all that's left to check since everything else seems to be OK. Thanks.

[misslindseysue]

Originally posted by dbailey@Nov 10 2004, 04:12 PM
How do you pull the plastic cover off of the rear pillar without breaking it?
Very carefully.

[coredump]

I've had it happen, but my car was under warranty so I just took it to GM told them it was busted and when I went back a few hours later it was working again. Almost like magic or something.

[FormulaNERD]

this might help a little....

images were too large to post here...

http://img63.exs.cx/img63/9418/rearspeakers1.jpg

http://img63.exs.cx/img63/3443/rearspeakers3.th.jpg (http://img63.exs.cx/my.php?loc=img63&image=rearspeakers3.jpg)

[misslindseysue]

You don't need to take off the rear deck to get at that module, just most of the cladding on that side of the car.

[FormulaNERD]

i know, i'm posting 2 pictures... but my net is running really slow, and the other is uploading.

[misslindseysue]

Gotcha.

[dbailey]

:huh: Well I found the module behind the rear panel. Does anyone know how to test it to determine if that is why my rear defroster is not working? Thanks all!

[Oldsman]

when you press the switch on you should have 12volts coming to the module. now you will need to find out what wires are for the defogger. which you will need a wiring diagram of the circuit.

i know mine hasn't work for who knows how long. i think it is the switch but not sure. i replaced the relay and checked the wirng to the switch but never got farther.

i would statr at your switch and find the wires for it and make sure you got 12 volts in and then see if it send 12volts out then go to module. always best to check the whole circuit out.

if you can't get a wire diagram let me know and i will dig for the info for ya.

[Oldsman]

it should be a black wire. it should be seperate from a dark green and black wire. this black wire comes from the fuse to the junction box then to the module.

the other black wire should not have 12 volt because this is what comes from the antenna and goes back to the audio.