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2011 Silverado - blower motor went dead!


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rodbuilder
Novice

Oct 10, 2016, 5:31 AM

Post #1 of 9 (447 views)
2011 Silverado - blower motor went dead! Sign In

I took my 'new' Silverado over to see a friend of mine and on the way back home the heater blower stopped working. So after learning about the resistor they now have in this newer stuff I had a guy replace it for me and still nothing!

We checked the resistor harness and it has current going to it. All the fuses checked out ok too.

I started thinking it might be the control switch because I've never seen a blower quit on all the speeds, so he put it back together.

Where do we go next? How often do you guys see the switch fail on one of these newer trucks? If it's the blower I'm really puzzled by this, because I've never seen a heater blower just quit altogether. The older stuff I've worked on in the past maybe lost one of the speeds, but they didn't go completely dead.

By the way - it's a Silverado work truck and has the two-knob control for fan speed and heat level.

Thanks a bunch for any help on this.


kev2
Veteran
kev2 profile image

Oct 10, 2016, 9:21 AM

Post #2 of 9 (436 views)
Re: 2011 Silverado - blower motor went dead! Sign In

time permitting I will try to add a wiring diagram-
this kinda works backward, it has constant 12v to blower motor* and we vary the ground.
SO with KOEO is there 12v at blower motor - purple or pink ?


(This post was edited by kev2 on Oct 10, 2016, 11:09 AM)


rodbuilder
Novice

Oct 10, 2016, 11:29 AM

Post #3 of 9 (426 views)
Re: 2011 Silverado - blower motor went dead! Sign In

I don't know yet. I'm waiting for my guy to get off of work and take the blower out for me.


rodbuilder
Novice

Oct 10, 2016, 11:37 AM

Post #4 of 9 (425 views)
Re: 2011 Silverado - blower motor went dead! Sign In

I really don't know what a diagram would do for me. If it's not getting juice, it's not getting juice! If the damn thing needs more than a motor it's going to a shop.

Why the stupid manufacturers persist in changing this stuff is totally beyond me. If it's not broke why do they think it needs fixing?


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 10, 2016, 11:54 AM

Post #5 of 9 (420 views)
Re: 2011 Silverado - blower motor went dead! Sign In

For current (juice) to flow in a circuit, it needs a path from the battery (source) and a path back to the battery.

Inspect the blower resistor connector and make sure the terminals are not all melted.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Oct 10, 2016, 11:56 AM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 10, 2016, 12:03 PM

Post #6 of 9 (416 views)
Re: 2011 Silverado - blower motor went dead! Sign In


Quote
Why the stupid manufacturers persist in changing this stuff is totally beyond me.


They have been wired that way for 30 years that I can remember.

Did you even test the fuses?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 10, 2016, 12:10 PM

Post #7 of 9 (414 views)
Re: 2011 Silverado - blower motor went dead! Sign In

At least back to the 70s - add ground or 12V+. Put in wrong one they spin backwards - long time now,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 10, 2016, 12:14 PM

Post #8 of 9 (410 views)
Re: 2011 Silverado - blower motor went dead! Sign In

Still can do that. I've had a couple come in after somebody changed a blower motor will no air flow complaint and the wires were reversed.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



kev2
Veteran
kev2 profile image

Oct 10, 2016, 12:31 PM

Post #9 of 9 (407 views)
Re: 2011 Silverado - blower motor went dead! Sign In

sorry the system is not as simple as old - it is what it is.
I was trying to walk you thru some diagnostic steps. , I have attached a diagram and will mention, PI0695A, PIE0222A these are engineering notes from GM akin to a TSB fro blower being inop, a known issue and troubleshooting ideas.


diagram http://www.revbase.com/...ownloadPdf?id=878998






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