Highlander 4WD V6-3.3L (3MZ-FE) (2004)
Blower Motor: Testing and Inspection
COOLING UNIT MOTOR SUB-ASSEMBLY W/FAN (MANUAL AIR CONDITIONER)
a. Connect the positive (+) lead from the battery to terminal 2 and negative (-) to terminal 1, then check that the motor operation smoothly.
If operation is not as specified, replace the blower motor.