2016 3500HD - blower stopped working

[eurobound]

I know there are quite a few threads on the blower motor stopping and in particular having heat on one side and cool on the other or something like that which I think might be a different issue actually.

 

I just have an issue at the moment where the blower just doesn't run anymore and I don't know how to figure out if it's the wiring harness, the control board or the motor part that spins and has a coil on it.

 

All fuses are fine and I was even able to get it working again when I had it all out and connected the harness to the control board . Put it all back together, tested it again when mounted and it worked. Next morning didn't work anymore.

 

I've heard the wiring harness can have breaks in it, but I'm not sure if the control board could have gone bad and/or the motor/stator thing? Can I rule either / any of those out before I go ahead and purchase and replace them?

 

 

Any insight on how to go about this?