Got a new blower motor and resistor and when I wire it up nothing happens?

2005 GMC SIERRA
217,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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LESLIE MICHELLE GOURLEY
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Got a new blower motor and resistor and when I wire it up nothing happens. All fuses are good.
Jan 4, 2023 at 12:42 PM
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STRAILER
  • ASE Certified Mechanic
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  • ASE Certified Mechanic
When you did the blower motor did you replace the speed control resistor as well? Also let's check for power at BLWR fuse under the hood here is a guide that will help and i have included the blower motor speed control location and replacement instructions in the images below.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what happens.
Jan 5, 2023 at 10:53 AM
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LESLIE MICHELLE GOURLEY
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  • 2 POSTS
There is power at the fuse and I replaced the speed control resistor as well.
Jan 5, 2023 at 11:10 AM
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STRAILER
  • ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Can we check for power at the red wire at the speed controller (resistor?) Also, can we check for ground at the black wire? here is a guide also I have included the wiring diagrams for the blower motor so you can see how it works:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Please let us know what happens.
Jan 5, 2023 at 1:09 PM
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