Fan switch works on high only...New Pics....

[Dune]

glad to see you got it fixed Gleen

good pics...

Btw, you could have went to Sears to get that 1 socket

[Jurgen]

For 2002 the GM part number is 89018597(thanks wildfire), You do not have to take the dash apart, it is under the glove box just remove the screws in the middle and on the right JUST loosen the one on the left, then just let the cover rest on the floor, replys #16 - 17 have good pics of what you will see.

Thanks allot I've got the resistor out and now i need to find a good place that sell them and wont to sent them to Belgium.......

Because i think here in Belgium it will be to expensive.

Do you know a good shop for me....

Here are some pics of the resistor.

[ItsStopher]

If you can not get it let me know and I will get one here and mail it to you. Send me a pm and we can work out the details.

[Jurgen]

If you can not get it let me know and I will get one here and mail it to you. Send me a pm and we can work out the details.

I am going to the local GM dealer in my town today.

I will let you know that i need one or not.

[Jurgen]

Found one at my local dealer.... and its working on all speeds again

Got it for 30€ that's a reasonable price i guess.


Thanks allot ItsStopher for your guidance.


See you later until we meet again.

[DPutts]

Mine has just gone too thanks for the information  03z66

[MI_99XPL]

Great thread!

I had to replace my wife's Cavalier's resister and I was afraid it was going to be that hard.  The Cavalier had it behind the fan, horrible placement and hard to reach.

Looks like the AV is going to be a piece of cake.   Thanks to all the great posters on this thread.  Thanks everybody!!

[Cyrus]

Perfect timing on finding this thread. Speed 1 and 2 dont work on my 02. Thanks to all for pics, part #'s and comments on the removal and install of this part.  This will be another money saving, do it yourself project! I love it!!     Cyrus.

[MI_99XPL]

Thanks everybody, especially everyone who posted pictures, part numbers, and prices.  I got my fan working again.  Only took about 30 minutes in the 35 degree temps we were having today in Michigan! 

I had to remove the round cap covering the blower motor to get to the plug, and surprisingly it was easy to gt back on.  I thought for sure it wouldn't be. 

Also, for 2002 owners, this might be a good time to replace the HVAC air filters since the main cover is off.

[Cyrus]

Replaced the resistor today. The old one looked just like the pic on reply #26. It appears to be moisture damaged the electrical pathways on the circuit board.  While I was in there I changed the cabin filters.  Oh yeah.... $48.00 for the resistor from the dealer.   

[sperry]

I can not believe they are still using a design I found in my first Chevy, 1975 K5 Blazer. I went through at least 7 of them over 18 years. I used to go to the junk yard and get them, use it for a year or so and then replace it again.

Simple design, but it is probably placed in the housing that is now in the passenger foot well.

Look for a couple of hex headed nut screws and pull out a funny looking piece with a few spring like thingys (thanks YGGM). You'll find one or more burnt off or very discolored ones.

I think I may have attempted to re-solder them once ot twice, but it never worked out. Junk yards were much cheaper than OEM from GM and no one back then, through '92 anyway, ever had the part.

I've been doing a lot of re-soldering tonight!

I just saw the posting with the rest of the nomenclature. I forgot to add there will be a wire loom clip going into it also. That's the stuff!

That design was changed in the 03 AUTO Air and likely prior MY's using that system. Manual A/C fans use the resistor still in the 03 (likely for the next few MY's too).

The AUTO air uses a solid-state relay-like device. A MOSFET (Metal Oxide Semiconductor Field Effect Transistor), configured to vary the on/of time (duty cycle) of the blower motor. In the Av, it's in the (AUTO AIR) HVAC controller, in the Trailblazer, it's in the UBEC and looks like the other relays.

[tanneritekid]

Hello all!

I have an 05 that stopped blowing air while it was 113 degrees outside .  I still have power to the controls and I can hear the clutch kick in.  So I am guessing that this is my problem as well? 



Will it be the same part #?

Are the parts Dept's open on Sundays? If not where can a guy get after market ones?


Thanks!!!

ETA: the air is not computer controlled, just the normal old style.

[tanneritekid]

OK pulled it out,  It melted the big black wire in this plug.  Where would I find the burned fuse?



My resistor:



What do I need to do to get my A/C working ASAP again?

[WILDFIRE]

Hello all!

I have an 05 that stopped blowing air while it was 113 degrees outside .  I still have power to the controls and I can hear the clutch kick in.  So I am guessing that this is my problem as well? 



Will it be the same part #?

Are the parts Dept's open on Sundays? If not where can a guy get after market ones?


Thanks!!!

ETA: the air is not computer controlled, just the normal old style.

doubtful

[JohnBChef]

*Bump* I just wanted to bring this thread back up...

     I went to pump gas today. Waited in line chillin with the AC on. Pumped gas, started up,  and the HAVC fan didn't work on any of the speeds. 10 minutes of diagnostics in the parking lot of BJ's and I ruled out the fuse, and the HVAC controls. I yanked off the Passenger floor HVAC access cover, gave the wiring harness under the resistor pack a jiggle and it miraculously started working again. I want to investigate the root cause of failure. I detected sparking/arking in the wire bundle at the connector. There is a gremlin there and I want to expose him before I slay him! Incedentally Yes I was able to get it working there in the parking lot. Why should a man suffer on the 2nd hottest day of the summer in Baltimore. I mean I work in a kitchen but still!
     Anyway I am bumping this thread just in case I need to go parts shopping tomorrow

JB

[JohnBChef]

     Oh Yeah I certainly found this picture in my truck today...

     The black wire grounded out on the resistor pack. I ended up having to replace one resistor pack at a little under $50 without my gm wholesale discount... but there was no way I was traveling back from Baltimore to NC without AC! However I did get the satisfaction of fixing it right in the driveway of the dealership. I would have done it in less than 20 minutes. But I had to dig out the semi melted metropack connector on the black wire and replace that. The dealership was cool they threw that in for free. Well it was either that or fight the computer for 5 minutes to figure out how much i costed. To think someone might have paid their dealership to diagnose "HVAC blower motor failure" Then charge them $150. BLAH

[WILDFIRE]

glad you got it figured out 

[muck]

thanks guys for all your help!

i have an 03 and the blower quit today at all speeds.  thats ok it was only 107 today!  i had the same problem with the meltdown on that black connector, except about half of it was melted.  that explains the burning smell

after searching and finding this post i diagnosed it in about 5 minutes.

thanks again for your help!

[muck]

ok i bought a new resistor for $49.00.  i also needed the black connector plug because it had melted also.  it was only $95.00!!!  thats right $95.00!  couldnt believe it.  i was thinking he was reading it wrong, more like 95 cents!  its just a plastic plug with some wire leads.  i still thought he was wrong so i called all chevy dealerships in town and the same price is what i found.

when i called henserson chevy, they said $95.00, but we can do better then that.  he sold it to me for 80 which i thought was very nice.

anyway i got it installed and now speed 5 doesnt work.  i figure they must have sold me the wrong resistor.  i gave him the part number listed in this thread and he said its no good.  i will go back tomorrow and see what i can find out and be sure to post the results.

[WILDFIRE]

hope you get it fixed, let us know what the new part#'s are

[muck]

ok got it fixed. 

while installing the new connector plug, i touched some metal and it shorted out, blowing the 40 amp fuse under the hood.  i replaced that and now all five speeds work.  from what i understand,  the resistor controls speeds 1-4, and speed five basically bypasses the resistor for direct battery power, which comes from that 40 amp fuse under the hood.  those fuses have a clear top so you can see if they are blown.

for the 03 av 1500 the resistor part number is- 89019089 and was $49.00.

i dont know what the part number is for the connector plug since i threw out the bag it came in. i do know it cost $95.00.

the dealer said that they sell one a day at least.  i guess they go out often but they say this is a new one that should fix the problem.

hope this helps someone in the future!

PM me if you have any more questions.

thanks

[WILDFIRE]

glad you got it working, thanks for the part number 

[Darmas32]

I almost took my Avy to the shop until I read this post.  You guys have made my weekend!

[ItsStopher]

I almost took my Avy to the shop until I read this post.  You guys have made my weekend!

Congrats on your first post 

[PK^FTF]

didn't want to start another topic.    .    .    .    but I have a 03 Av 1500 4x4 40,000 miles .    .    .    .    it has Manual ac/heater controls (ticks on dial)

My problem is the blower has a mind of it own.    .    draining battery, like everyone else's.    .    

I need to replace the Resistor.    .    .    right? I don't have a Blower control Module, because it not climate control.    .    .    just making sure


My deal is with the 40 amp fuse OUT the 1 -4 speed work, just not the 5th speed.    .    .    .    .    do I still need to replace the resistor, as last poster said resistor controls 1-4.    .    .    .    .    

also I have the 03 part number.    .    .    but should I get a 7/32 wrench?

any help before I start replacing