Hvac blower motor not working
Thread Starter
Instructor
Joined: Mar 2016
Posts: 200
Likes: 14
From: Wilmington Nc
Hvac blower motor not working
OK so I picked up a 98 c5 and hvac blower isn't coming on. I switched the control panel and nothing. This lead me to believe it was the fan it's self. I removed it and used a 12v batterie to test it and sure enough it works.
So then it lead me to believe it was the control module located right behind the motor. Bought a new one from car quest and still not working.
I decided to check the voltage across the 7 prong power wires leading into the module and I went through each fan speed which would make a certain color light up.
Then later I did it again and the only color to light up was the red power wire (1st wire) and that's it. It didn't matter which fan speed it is set to.
There is no power coming out of the module to the fan.
Thus is a hard one for me, help would be appreciated.
So then it lead me to believe it was the control module located right behind the motor. Bought a new one from car quest and still not working.
I decided to check the voltage across the 7 prong power wires leading into the module and I went through each fan speed which would make a certain color light up.
Then later I did it again and the only color to light up was the red power wire (1st wire) and that's it. It didn't matter which fan speed it is set to.
There is no power coming out of the module to the fan.
Thus is a hard one for me, help would be appreciated.
Thread Starter
Instructor
Joined: Mar 2016
Posts: 200
Likes: 14
From: Wilmington Nc
Manual system, I checked every fuse in passenger foot well. Yes every single one. And I can't remember off the top of my head but the relay was for hvac control.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 301
From: Columbia SC
Here is the schematic and connector views to get you going.
https://www.dropbox.com/sh/53rua8qye...yayV7SATa?dl=0
Please tell us exactly where you get full voltage.
Mr. Sam
https://www.dropbox.com/sh/53rua8qye...yayV7SATa?dl=0
Please tell us exactly where you get full voltage.
Mr. Sam
Thread Starter
Instructor
Joined: Mar 2016
Posts: 200
Likes: 14
From: Wilmington Nc
Thank you for the schematic. I'm only always getting voltage on the first pin of the 7 pin connector. Some times the others decide to work when. They want, and when they do give power, your as soon as I plug in the fan it stops.
Thread Starter
Instructor
Joined: Mar 2016
Posts: 200
Likes: 14
From: Wilmington Nc
Here is the schematic and connector views to get you going.
https://www.dropbox.com/sh/53rua8qye...yayV7SATa?dl=0
Please tell us exactly where you get full voltage.
Mr. Sam
https://www.dropbox.com/sh/53rua8qye...yayV7SATa?dl=0
Please tell us exactly where you get full voltage.
Mr. Sam
