I have a 2015 ram 1500 tradesman 3.6 4 w/d. My radiator fan quit working and I bought a new one it doesn't work. I just want to put on a switch in the cab and can't get it to work. I just got told that I can't do that with a ram fan. do I need to get a different fan? I know the new one works. I've already replaced the cooling sensor and air intake sensor. The 80 amp fuse is fine and I'm getting power to the fan motor. just need to get this damned truck back on the road so a switch in the truck seems like a good idea if I can get it to work