The blower motor works intermittently?

FLANDERSJOHN

MEMBER
2017 CHEVROLET SILVERADO
5.3L
V8
4WD
AUTOMATIC
80,000 MILES

I have replaced it twice. After last replacement it worked fine for about 2 months then the problem returned. When not working I can sometimes get it to work by slamming the passenger door or banging the motor itself, sometimes it just starts working by itself. I have checked the wiring connections and they seem tight.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Hello John,

It sounds like either the blower speed controller is going out or you have a bad ground which is located at the right front of the defrost deflector. When the blower is not working test the black wire for power using a test light, if it lights up the ground is bad. This guide can help, and I have included the blower motor wiring diagrams as well so you can see how the system 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.

Images (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

+1

Friday, March 3rd, 2023 AT 9:32 AM

FLANDERSJOHN

MEMBER
1 POST

Thank you for the information. Ken L was extremely helpful. I hadn't considered the possibility of a bad ground. I followed his testing procedure, found that the ground was indeed faulty, I was unable to easily fix the original ground due to its location so I ran a new ground. Problem fixed. Saved me a couple of hundred dollars. Again, thank you for the help.

John F

Was this

answer

helpful?

Yes

No

Tuesday, March 21st, 2023 AT 9:06 AM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.

Can you please leave us a rating? (Copy entire link)

https://www.google.com/search?q=2carpros&gs_ivs=1#lrd=0x80dcd47364be5d0d:0xba091aa4209f4497,1,,,&tts=0

and

https://www.sitejabber.com/reviews/2carpros.com

Was this

answer

helpful?

Yes

No

Tuesday, March 21st, 2023 AT 9:07 AM