RAM 1500 Van V8-5.2L VIN Y (1999)
Blower Motor Switch: Testing and Inspection
Rear Blower Motor Switch Test
REAR BLOWER MOTOR SWITCH
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/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 AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
1. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Remove the accessory switch plate from the
instrument panel. Refer to Accessory Switch Plate Removal and Installation.
See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Service and Repair/Instrument Panel Accessory Switch Plate
Check for continuity between the ground circuit cavity of the rear blower motor switch wire harness connector and a good ground. There should be
continuity If OK, go to Step 2. If not OK, repair the open circuit to ground as required.
2. With the rear blower motor switch wire harness connector unplugged, place the rear blower motor switch knob in any position except the OFF
position. Check for continuity between the ground circuit terminal and each of the blower motor driver circuit terminals of the rear blower motor
switch as you move the blower motor switch knob to each of the three speed positions. There should be continuity at each driver circuit terminal in
only one blower motor switch speed position. If OK, test and repair the rear blower driver circuits between the rear blower motor switch wire
harness connector and the rear blower motor resistor or the rear high speed blower motor relay as required. If not OK, replace the faulty rear
blower motor switch.
