My blower fan stopped working

Tiny
DINGER_GREG
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 42,000 MILES
My blower fan stopped working, what do I look for?
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Saturday, January 2nd, 2010 AT 10:12 AM

1 Reply

Tiny
SEAN M
  • EXPERT
Hello,

The first item you should check is the blower motor relay.
The relay is located in the under-hood fuse box (see diagram below).
Look for any corrosion or burnt pins.

This relay can also be tested.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the relay is good, it could be a bad blower control module (for automatic HVAC system), or a bad motor. It can also be faulty wiring. Check to see if you have power going to the motor. A short in the wiring can keep power from reaching the motor.

https://www.2carpros.com/articles/how-to-check-wiring

I have attached the diagrams for both versions below.

Please let me know of any questions.
Thank you.
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Tuesday, November 2nd, 2021 AT 2:54 PM

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