Blower motor or blower motor resistor issues

Tiny
EPICKET2
  • MEMBER
  • 2006 CHEVROLET TRAILBLAZER
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
Replaced blower motor resistor, while doing so the hot and ground wires accidentally touched. The fuse to the blower motor blew, so I replaced it and swapped out the new blower motor resistor. Plugged everything back up and the blower will not turn on. Is it possible I damaged the blower motor fan? Or what else should I check? I checked all of the fuses and they are all good. Thanks in advance! :-)

Saturday, June 1st, 2019 AT 12:09 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Welcome to 2CarPros.

At this point, if you know the fuse is good, we have to determine where the power is lost. I have provided a diagnostic flow chart below in the pictures. I had to break it into several pictures so you could read everything.

To test the system, you will need to use a test light and a volt meter or multi meter. Here are links to help you with using them:

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

Also, confirm there is power to the fuse you replaced.

_____________________________

One last thought. Check relay 45 in the under hood fuse/relay box. You can either switch it with another relay with the same part number, or test it. Here is a link that explains how to test a relay. Picture 5 shows the relay I'm referring to.

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

_____________________________

Let me know what you find or if you have other questions. I hope this is helpful.

Take care,
Joe
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Saturday, June 1st, 2019 AT 8:37 PM

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