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My blower motor won't turn on.

Tiny
HALLB
  • MEMBER
  • 2005 GMC SIERRA
  • 140,000 MILES
It all started when I change the Tempurature control resistor. Then my blower motor went out three days later. I replaced the motor, three days now the blower motor will not come on. I have checked the blower motor using a battery source and it checks good. I have check the resitor and it checks good.
Can you help me?

Brian
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Monday, January 30th, 2012 AT 7:03 PM

3 Replies

Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Follow the motor power wire to the blower motor module in the top of the a/c case and replace it.
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Monday, January 30th, 2012 AT 7:36 PM
Tiny
HALLB
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I don't have a module in that case all I have is a 40 amph fuse and it checks good also.
I also foregot to tell you that there is some current going the blower motor sometimes but very little as the motor will turn about an inch then stop and the sometimes it will turn on.
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Monday, January 30th, 2012 AT 8:20 PM
Tiny
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  • MECHANIC
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U WILL NEED TO CHECK THE VOLTAGE ON THE POWER WIRE. YOU WILL NEED TO CHECK THE GROUND. The resister controls the motor by toggling the ground.
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Monday, January 30th, 2012 AT 9:58 PM

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