The blower motor on a Ford F350 may occasionally not run due to a loose wire or faulty connection. This can often be corrected by re-seating the connection.
You need to run a switched, full-voltage wire to the "bat" terminal.
The most conclusive test of a blower motor is to run a wire from the battery directly to the motor, being careful not to ground the wire out anywhere by accident. If the motor will not run when wired directly to the battery, it is probably bad.
Use a jumper wire from the battery + (pos) terminal to the positive on the blower motor, and run a - (Ground) wire from ground on the motor, to chassis or frame.
You will need AWG #3 if it is a short run.
Run a wire from the POSITIVE terminal on the battery and touch the red wire (positive) to the window motor and run another wire from the NEGATIVE terminal on the battery and touch the green wire (negative) to the window motor. The window should go down. Reverse the wires to make the window go up.
unplug motor run fused jumper from batt and touch to two wire plug on motor
Run a wire from the POSITIVE terminal on the battery and touch the red wire (positive) to the window motor and run another wire from the NEGATIVE terminal on the battery and touch the green wire (negative) to the window motor. The window should go down. Reverse the wires to make the window go up.
Motors that use capacitors are single-phase AC motors. The capacitor is used to "start-and-run" the motor. The capacitor is wired between the incoming hot service wire and the "start-and-run" terminal of the motor. The other terminal of the motor is connected to the outgoing neutral service wire. These capacitors are designed to run on AC (two DC capacitors back-to-back) so It doesn't make a difference which way round the two terminals are wired. If the case is metal it is usually grounded to the ground wire. Some motor "start and run" capacitors are plastic-cased so don't need any ground wire.
Either replace the burnt wire or run new to the blower motor with a toggle switch.
Thermal relay stuck.
195 to 210 is the best running temperature