Jump to content

Blower Motor

Powers

By Powers
in Ask A GM Technician

Recommended Posts

Powers New Member

Powers

Posted
Posted

I drive a 2007 Chevrolet Silverado classic 4x4, when turning off my truck my blower motor continues to run. I was told this was my blower motor resistor and to change it, in changing this I pulled the old one out and to put the new one, I had to cut the wires to install the new part as soon as I went to cut wires they smoked on me, this scared me cause there was still power running to the plug. Is this common? Could this still be the blower motor resistor or a deeper problem?

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

Shouldn't be any power going to the motor when the key is off. Could more than likely be the crap wire they use these days. We have more of it than ever, yet, it's the weakest, flimsiest crap I've ever seen before. Could be a faulty ignition switch too - many possibilities. Some testing is in order.

 

Once you get that sorted out, you'll have to replace a fuse or 2, since the smoke was let out of the wire there.

kstruckcountry Senior Enthusiast

kstruckcountry

Posted
Posted

The motor running when the key is off is a pretty common sign of a bad blower motor resistor. Generally, you want to unhook the battery when doing any electrical work. I would complete the replacement and see if it fixes the issue, if not there's definitely more going on.

 

Sent from my SM-G920V using Tapatalk

Doug_Scott Senior Enthusiast

Doug_Scott

Posted
Posted

Logic says that if the motor was running with the key off then there MUST be power on one of the wires. Don't know if there should be power on one of the wires or not, but I do know that cutting multiple wires in one cut is a no-no. You are only asking for trouble when you do that, especially with the battery still connected. This likely only took out a fuse or two, but could have just as easily caused a lot of expensive damage if it were a different circuit. I agree with the above post, disconnect the neg post of battery and continue repair. See if the problem is fixed now. You may need to replace some fuses as well..

tbarn Senior Enthusiast

tbarn

Posted
Posted

Yes. 12v to the blower resistor with key off. Usually via 40a fuse in under hood fuse box.

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

Odd design ...

Doug_Scott Senior Enthusiast

Doug_Scott

Posted
Posted

Odd design ...

 

Perhaps it was done that way to allow remote start to run the fan? Maybe an easier/cheaper way to do it.

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

Ahh, didn't think of that. Makes sense.

 

Would think they'd be concerned with a fire hazard, but I suppose that's what the fuse is for.

GasHog369 Senior Enthusiast

GasHog369

Posted
Posted

Same thing happened to me in my old 2006.., cut the wires. It grounded out since you are cutting thru the ground and positive at once. When the cutter contacts both it creates a connection. Likely blowing a fuse. Mine did.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Getting greedy...   The AC pump has been replaced at least once per service records, and it's been recharged twice since 2018 or so, in approximately 2 year intervals between those charges.   It was done at the same shop...clearly they were enjoying the revenue of recharging the system periodically versus actually tracking down and fixing the leak. I learned that the owner was 88 years old when she passed in 2023, so maybe they assumed only a temporary fix was needed anyway.   The system is basically empty now, the compressor spins freely, so I'm guessing it "just needs a recharge".   I vacuumed it down, and it has basically held overnight. Doesn't appear to leak under vacuum, check! So it must leak under pressure. I don't have a way to pressurize the system and pressurizing it with shop air wouldn't be great for the air dryer (which is probably toast anyway?)   The dryer (accumulator? I'm not an AC expert) has a Schrader valve, but the high side has an old ball-type valve, which are notorious for leaking. It's clearly had schmutz blown out of it at one point because the line/area next to the valve is coated old black crud, which I assume is AC refrigerant residue/oil, or maybe even dirty dye. I think I'll roll the dice and replace the valves. I have a black light around here somewhere so I'll find it and shine it around the engine bay in the dark to see if there's any dye.   I can't think of another way to track down the leak other than injecting some dye (if it doesn't have any) and having it charged up. We can't buy R134a off the shelf here anymore, so I'll run it up to Jiffy Lube and have them do it. I think I have a coupon. At the very least, the charge should last long enough for a year or two, according to history. I think this truck will be long gone by then. But cold AC is a selling point.    
    • clowe1243
      6.2L L87 Powertrain Engine Noise (Lifter Failure) Question

      By clowe1243 · Posted

      Got the truck back today.  Called them yesterday to get an update, and miraculously my truck is finished?!?! The $13k out the door was complete bullshit!  Ended up being over $14k.  They added some bullshit service bulletin that I cant even find, where they replaced my radiator without telling me or asking me, and charging me for it.  Need to do more research into it, cause they leaked the first delivered radiator was ran over by FedEX.  Sounds like bullshit to me. 2.5 Months for an engine swap, which ended up being remanufactured, not new; ****ing ridiculous.  Brakes are squishy as hell, not sure if its from sitting.  Will give a couple days to see it that figures it self out.  GAVE IT BACK TO ME WITH 1 GALLON OF GAS!  Just filled the tank the day before drop off, more bullshit.  My dash cam SD card was formatted, not really much I can do about that. 3 year, 100k GM warranty at least.  Time to sell it and say **** off to GM.  Bad experience.  Cant wait for the survey email to come through.  Overpriced Raptor R, here I come!
    • haoleboyZ71
      Radio Update

      By haoleboyZ71 · Posted

      If I forget the phone in the truck, and forget the truck in the phone, and reconnect.  It works great for the day.  Truck sits overnight, and the next day is a no go.  It will connect Android Auto via usb cable, but not bluetooth.   Ive tried Everything in this thread so far, and nothing works for more than a day.   I think I might have to go to the dealer and have them flash the pcm.   thanks for all the suggestions guys. 👍
    • Bill Lemmond
      primary drive belt tensioner

      By Bill Lemmond · Posted

      2022 2500HD Crew Z71 Duramax single alternator.  Recently had the primary (water pump / fan) belt tensioner pulley bearing to fail while hundreds of miles from home of course the plastic pulley melted and belt shredded which took out some wiring. Found a replacement tensioner assembly and belt to continue now would like to find a replacement for just the pulley and bearing to have a spare assembly in case of a repeat, the rest of the tensioner is fine. Has anybody here found a correct replacement part for just the pulley and bearing? Any help is appreciated.
    • Atlas
      Upgrade to a 2026 AT4 with the 3.0L Duramax

      By Atlas · Posted

      +1 for the 3.0   Perfect for 1500 pickup towing duties.   Perfect engine for a 1500 pickup period. Huge torque at stunningly low RPM makes it feel a lot lighter than it is. The fuel mileage is insane for a tall and heavy 1500... 30+ on the highway. Mid 20's around town.   It's probably not perfect if you bought a 6.2 for the braaaaaaapppppp V8 noises and wrapping it out to 6k. The LZ0 acts and sounds like a small turbo diesel and there's nothing you can do to make a small turbo diesel sound like a big one, and you can't make an inline diesel sound like a V8 diesel/big Duramax. It's a different driving experience altogether.   Drive one, I think you'll like it, though...

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...