RAM 3500 Truck 2WD L6-5.9L DSL Turbo VIN 7 (2002)
Blower Motor Resistor: Testing and Inspection
For circuit descriptions and diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND
ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM
CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN
ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
1. Disconnect and isolate the battery negative cable.
2. Unplug the wire harness connector from the blower motor resistor.
3. Check for continuity between each of the blower motor switch input terminals of the resistor and the resistor output terminal. In each case there
should be continuity If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor or blower motor as
required. If not OK, replace the faulty blower motor resistor.
