Hello I have dodge ram van with the 5.9. My blower fan will not work on the highest setting. I have the other fan settings working fine. I have replaced the fan switch and the resister pack and that didn't fix the problem. Any ideas????

 

It could be the blower motor itself. The motors are either two or three pole types. Seeing that the high fan speed isn't working after replacing the other important parts, the motor needs to be tested. You can test the motor with direct battery power if needed. If it runs the higher speed setting, then the problem is some where else. If not, then the blower motor life is nearing an end.

 

Thanks I will give the blower fan a try.