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A/c Just Quit

tramz

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tramz Enthusiast

tramz

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So I go into Home Depot come out jump in the truck and start it up, notice its getting warm, see that the a/c light and recirc light are both on, crank the fan speed to 5 and nothing. Turn the a/c off, turn truck off and back on press the a/c switch and hear the compressor kick on for a second. I checked all the fuses and relay and all are good. Anyone have a guess. For grins I ran a scan and read P0633, don't have a clue what that is either. In Florida and 100 degrees today, any help is appreciated. :thumbs: Thanks in advance.

 

The search feature, used it, but tooooo much to filter. :smash:

tramz Enthusiast

tramz

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Thanks Peter for your help. All 5 speeds are out, all had been working prior to today, so naturally I thought the relay was the root, but when relay and fuses check out I got stumped. Plan on replacing the resistor and see what happens, even if its not it, can't hurt. Thanks again.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Thanks Peter for your help. All 5 speeds are out, all had been working prior to today, so naturally I thought the relay was the root, but when relay and fuses check out I got stumped. Plan on replacing the resistor and see what happens, even if its not it, can't hurt. Thanks again.

 

Since you lost all speeds I'd inspect the connector closely for signs of melting before I spent the money for a new resistor.

tramz Enthusiast

tramz

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I went to O'Reilly's and got the blower resistor module and started breaking things down. Taking John's advise I checked the connector out and sure enough, it was fried along with the resistor. So I called O'Reilly's back and they said try the dealer, same with NAPA. By the time I got this far the dealer was already closed. Try again tomorrow. Thanks guys for you advise and help, it was greatly appreciated.

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tramz Enthusiast

tramz

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Local dealership didn't have the pigtail and said they'd have to order it and would take 3-4 days, lists for $97, so call the nearest dealership (60 miles away) and one of my old friends is now the parts manager, told him what happened and he had the connector and said one of his guys was making a parts run to my area about 15 minutes from me and he'd throw it on the truck and have the guy call when he made it to town. He sold it to me for $63. Only thing that didn't make any sense is if GM issued a TSB, knows it's a common problem, why didn't they have the parts wire colors coded the same, came with 4 white and 3 black, not a problem, just makes you scratch your head. Anyway installed the pigtail and resistor, splicing, crimping, and heat shrinking, the install took about 20 minutes and blower screams again. Thank you Peter and John, your help saved me time and aggrevation.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Local dealership didn't have the pigtail and said they'd have to order it and would take 3-4 days, lists for $97, so call the nearest dealership (60 miles away) and one of my old friends is now the parts manager, told him what happened and he had the connector and said one of his guys was making a parts run to my area about 15 minutes from me and he'd throw it on the truck and have the guy call when he made it to town. He sold it to me for $63. Only thing that didn't make any sense is if GM issued a TSB, knows it's a common problem, why didn't they have the parts wire colors coded the same, came with 4 white and 3 black, not a problem, just makes you scratch your head. Anyway installed the pigtail and resistor, splicing, crimping, and heat shrinking, the install took about 20 minutes and blower screams again. Thank you Peter and John, your help saved me time and aggrevation.

 

I know how hot it's been down south so I'm glad I could help. :rollin:

mljenkins Enthusiast

mljenkins

Posted
Posted

My 5th speed went out about a month ago. I did some research here and on other forums and came across this company that sells a better harness (with resistor) for $72.

 

http://www.motorcity1.com/

 

They have the TSB on how to repair it here:

 

http://www.motorcity1.com/TSB_Heater.htm

 

On the TSB there are GM part numbers which you could take to gmpartsdirect.com and get fairly inexpensively. That is what I plan to do when I get time. I wasn't sure if the MotorCity part was worth the extra money, but I would definitely prefer not to have this happen again. I wonder if GM has since corrected their parts so this does not happen?

 

It really aggravates me as I am out of warranty now ('06 with 36K warranty and 50K miles on it).

 

You didn't by chance take pictures of where the resistor goes did you? Or was that the second picture you had, the black make connector that was molded into something? I haven't gotten up under there to check out how long it is going to take me.

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

Man! GM is proud of that pigtail. Even the $63 for a pigtail seems like a bunch.

 

But I like that Motor City kit.

 

Chuck

2005LT Enthusiast

2005LT

Posted
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Glad to hear you got it working again Tim :rollin: That motor city kit will come in handy for future cases, good link Matt.

tramz Enthusiast

tramz

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My 5th speed went out about a month ago. I did some research here and on other forums and came across this company that sells a better harness (with resistor) for $72.

 

http://www.motorcity1.com/

 

They have the TSB on how to repair it here:

 

http://www.motorcity1.com/TSB_Heater.htm

 

On the TSB there are GM part numbers which you could take to gmpartsdirect.com and get fairly inexpensively. That is what I plan to do when I get time. I wasn't sure if the MotorCity part was worth the extra money, but I would definitely prefer not to have this happen again. I wonder if GM has since corrected their parts so this does not happen?

 

It really aggravates me as I am out of warranty now ('06 with 36K warranty and 50K miles on it).

 

You didn't by chance take pictures of where the resistor goes did you? Or was that the second picture you had, the black make connector that was molded into something? I haven't gotten up under there to check out how long it is going to take me.

 

I got some pics of the entire experience will post when I get home this weekend. Under the dash, once you remove the cover and the two 7mm screws, the resistor is in plain view, staring you in the face, unplug the 7 pin connector, unplug the resistor from the blower, remove (2) 5/16" screws. Since you've only dropped 5th speed, your resistor module is starting to go. Picked mine up at OReilly's for $25. I found the motorcity site yesterday afternoon and ordered the kit to have a spare incase something fouls out again. The new pigtail I got from the dealership is 12 gauge wire and the factory installed harness has a combination 16 and 14 gauge. Hopefully no more issues, but if I do, I have a spares on hand.

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

It's always satisfying when a problem that seems potentially complicated and has a high likelyhood of taking a long time and a lot of effort to diagnose and fix, get resolved quickly. Very cool and satisfying...like a good cold beer.

 

:rollin:

Chuck

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