Wrangler L6-4.0L VIN S (2000)
Blower Motor Relay: Testing and Inspection
Relay Circuit Test
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. The relay common feed terminal cavity (30) is connected to the blower motor. This terminal supplies fused battery feed directly from a fuse in the
Power Distribution Center (PDC) when the relay is energized, and ignition switched battery feed from a fuse in the fuse block module through the
blower motor resistor when the relay is de-energized. There should be continuity between this cavity and the blower motor feed circuit cavity of
the blower motor wire harness connector at all times. If OK, go to Step 2. If not OK, repair the open circuit as required.
2. The relay normally closed terminal cavity (87A) is connected to the blower motor resistor output. When the relay is de-energized, terminal 87A is
connected to terminal 30 and provides the blower motor resistor output to the blower motor feed circuit. There should be continuity between this
cavity and the blower resistor outputs circuit cavity of the blower motor resistor wire harness connector at all times. If OK, go to Step 3. If not OK,
repair the open circuit as required.
3. The relay normally open terminal cavity (87) is connected to a fused battery feed from the PDC. When the relay is energized, terminal 87 is
connected to terminal 30 and provides full battery current to the blower motor feed circuit. There should be battery voltage at this cavity at all
times. If OK, go to Step 4. If not OK, repair the open circuit to the PDC as required.
4. The coil battery terminal cavity (86) is connected to the high speed output contacts of the blower motor switch. When the blower motor switch is
placed in the high speed position, fused ignition switch output is directed to the relay electromagnetic Coil to energize the relay. There should be
continuity between the cavity for relay terminal 86 and the high blower motor relay control circuit cavity of the blower motor switch wire harness
connector at all times. If OK, go to Step 5. If not OK, repair the open circuit as required.
5. The coil ground terminal cavity (85) is connected to ground. This terminal supplies the ground for the relay electromagnet coil. There should be
continuity between the cavity for relay terminal 85 and a good ground at all times. If not OK, repair the open circuit as required.
