RAM 1500 Van V8-5.9L VIN Z (1998)
Blower Motor Resistor: Testing and Inspection
The blower motor resistors used for the front heater-only or heater-A/C systems and for the optional rear heater-A/C unit can be tested in the same
manner. The front blower motor resistor is located in the engine compartment on the inboard side of the heater-A/C housing. The rear blower motor
resistor is located in lower housing of the rear heater-A/C unit in the passenger compartment.
The front blower motor resistor can be tested without removing it from its mounting position. The rear blower motor resistor must be removed from its
mounting position to be tested. See Blower Motor Resistor - Rear in the Removal and Installation procedures.
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIR-BAGS BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER
PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG 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.
