having fan control problems--fan will run on 1 or 2 for a while not on three at all-- some times on 4 but at some point will shut off--also seems if Im going at 35mph or more it keeps running--stop and go is when it seems to stop blowing it comes back on after i turn it off for a minute or two??? help

 

Welcome to DF
I will move your post to the 3rd Gen Ram section.

 

Hmmm. Could be a cold/broken solder joint in the switch or a bad resistor block on the blower itself. Since it won't run on three at all, I'd say the switch has gone south.