F 250 4WD HD Pickup V8-460 7.5L VIN G EFI (1997)
Blower Motor: Testing and Inspection
To test the blower motor, connect a No. 10 (or larger diameter) jumper wire directly from the positive battery terminal to the positive lead of the blower
motor. If the blower motor runs, the concern must be external to the blower motor. If the blower motor will not run, connect a No. 10 (or larger diameter)
jumper wire from the ground lead of the blower motor to a good ground. If the blower motor runs, the fault is in the ground circuit. If after testing the
positive and negative sides of the blower motor, the blower motor still will not run, the blower motor must be replaced.
For blower motor system diagnosis GO to Testing and Inspection/Climate Control System. See: Testing and Inspection