B4000 Regular Cab 4WD V6-4.0L OHV (1997)
3. Insert probes of voltmeter into connector at rear of blower motor and make contact with wire terminals. With engine running, measure voltage
drop across motor.
4. With engine running (battery voltage approximately 14.2 volts) the voltage reading should be within the range specified for each blower motor
speed selector switch position.
