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2. Connect the red tester lead to one red/yellow wire;
then connect the black tester wire to the other red/yel-
low wire. The meter must show less than 1 ohm.
3. Depress and hold the reverse override button. The
meter must show an open circuit.
4. Connect the red tester lead to the blue wire; then
connect the black meter lead to the black wire. The
meter must show an open circuit.
5. Depress and hold the reverse override button. The
meter must show less than 1 ohm.
NOTE: If the meter does not show as specified,
replace the switch.
Drive Select Switch
The connector is the two-wire black snap-lock one in
front of the steering post. To access the connector, the
cover must be removed.
NOTE: Resistance tests should be made with the
connector disconnected and on the selector-side of
the connector.
RESISTANCE
1. Set the meter selector to the OHMS position.
2. Connect the red tester lead to the red wire; then
connect the black tester lead to the white wire.
3. With the select switch in the 2WD position, the
meter must show an open circuit.
4. With the select switch in the 4WD position, the
meter must show less than 1 ohm.
NOTE: If the meter does not show as specified,
replace the drive select switch.
VOLTAGE
NOTE: The battery must be connected when per-
forming voltage tests.
1. Set the meter selector to the DC Voltage position.
2. Connect the black tester lead to the negative bat-
tery terminal.
3. Connect the red tester lead to the white wire on the
harness side of the connector.
4. Turn the ignition switch to the RUN position.
5. The meter must show 12 DC volts.
NOTE: If the meter shows other than specified,
check the harness, connector, 30 amp fuse, and bat-
tery connections.
Front Drive/Differential
Lock Actuator
NOTE: With the engine stopped and the ignition
switch in the ON position, a momentary “whirring”
sound must be noticeable each time the drive select
switch is moved to 2WD and 4WD. Test the switch, 30
amp fuse, and wiring connections prior to testing the
actuator.
NOTE: The differential must be in the unlocked
position for this procedure.
VOLTAGE
1. Select the 2WD position on the drive select
switch; then disconnect the connector on the actu-
ator wiring harness.
2. With the ignition switch in the OFF position, con-
nect the black tester lead to the black wire in the
supply harness; then connect the red tester lead to
the orange wire in the supply harness.
3. Turn the ignition switch to the ON position. The
meter must show 12 DC volts.
4. Connect the red tester lead to the white/orange
wire in the supply harness. The meter must show
12 DC volts.
5. Connect the red tester lead to the white/green wire
in the supply harness. The meter must show 10.2
DC volts.
6. Select the 4WD position on the drive select
switch; then connect the red tester lead to the
white/orange wire in the supply harness. The
meter must show 12 DC volts.
NOTE: The 4WD icon on the LCD should illuminate.
7. Connect the red tester lead to the white/green wire
in the supply harness. The meter must show 0 DC
volts.
8. Select Differential Lock on the drive select switch;
then connect the red tester lead to the white/orange
wire in the supply harness. The meter must show 0
DC volts.
9. Connect the tester lead to the white/green wire in
the supply harness. The meter must show 0 DC
volts.
NOTE: The 4WD and LOCK icons on the LCD
should illuminate.
NOTE: If the voltage readings are as specified and
the actuator does not function correctly, replace the
actuator (see Drive System/Brake System).
