HVAC fan help

[Mouellette]

I need some ideas!
My HVAC fan in my 2004 Ram 2500 quit working the other day so I set out to repair it. I changed the fan motor, the fan motor resistor and the HVAC control module. I still cannot get this thing to work. I have checked every fuse in the fuse block etc. The fan works as I tested it directly to the battery, still nothing when I install it in the truck.
Anyone have any ideas? I am at a complete loss.
Mark

 

[Bob4x4]

ignition feed good?Dark blue wire at the fan motor

 

[AllianceDiesel]

Also make sure you have a ground at thr plug

 

[Bob4x4]

The ground is supplied from the controller through the resistor

 

[Mouellette]

Thanks everyone,
I'll check the fan motor plug and let you all know what i find out
Mark