[Desert185]

For you RAM types the blower motor on mine went intermittent, which I find can be a semi-common issue. I pulled the motor and found dried leaves in the squirrel cage. The way it's mounted it acts like a bowl holding anything that might migrate down through the system. I blew it all out, including the dusty commutator area, reinstalled it with dielectric grease on the connector and it works great.

The motor speed switch runs the blower speed first three speeds through a resistor. The last, high speed position is direct voltage to the blower motor for high speed, so if you have an issue with the first three speed selections, the issue might be with the resistor. Any trash in the squirrel cage will eventually overheat the resistor and it will fail.

All this is accessible under the dash on the passenger side. In fact, it is easy for the passenger to kick the blower motor housing.