115
VOLTAGE
NOTE: Voltage tests must be made with the switch
and the actuator connected. The meter can be con-
nected at the actuator connector using a break-out
harness or MaxiClips.
1. Connect the black tester lead to the black wire; then
turn the ignition switch to the ON position.
2. Select the DC Volts position on the tester and observe
the meter readings for each of the three switch positions.
NOTE: If the meter does not show voltages accord-
ing to the chart, make sure the front drive actuator is
plugged in; then troubleshoot the switch, ignition
fuses, battery connections, or wiring harness.
Reverse Override Switch
VOLTAGE
NOTE: To perform the following tests, the ignition
switch must be in the ON position and the transmis-
sion shifted into reverse gear.
1. Connect the red meter lead to the black/green wire and
the black meter lead to a suitable ground; then select
2WD on the drive select switch. The meter must show
approximately 1.5 DC volts.
2. Depress the reverse override switch. The meter show-
ing should not change from step 1.
3. Select 4WD on the drive select switch. The meter
must show approximately 5 DC volts.
4. Depress the reverse override switch. The meter must
show approximately 1.5 DC volts.
Front Drive 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 wir-
ing connections prior to testing the actuator.
NOTE: The differential must be in the unlocked
position for this procedure.
VOLTAGE
1. Locate the 4-wire connector for the front drive actua-
tor on the frame to the right of the differential; then
connect the red meter lead to the orange wire using a
MaxiClip.
PR293
2. Connect the black lead to the black wire using a MaxiClip;
then select 2WD on the drive select switch.
PR295
NOTE: The black tester lead can remain connected
to the black wire for the remaining tests.
3. Turn the ignition switch to the ON position. The meter
must show battery voltage.
NOTE: If battery voltage is not shown, troubleshoot the
10 amp ignition (IGN) fuse on the power distribution
module, the ignition switch, or the main wiring harness.
4. Connect the red meter lead to the white/green wire.
The meter must show battery voltage.
5. Select 4WD on the drive select switch. The meter
must show 0 DC volts.
6. Connect the red meter lead to the white/orange wire.
The meter must show battery voltage.
7. Engage the differential lock. The meter must show 0
DC volts.
NOTE: If the meter does not show 0 DC volts, rock
the vehicle to help engage the differential lock; then
troubleshoot the drive select switch.
Stator Coil/Crankshaft
Position (CKP) Sensor
NOTE: Preliminary checks may be performed on this
component using the diagnostic mode on the LCD
gauge (see EFI Diagnostic System in this section).
WIRE COLOR
2WD
4WD
DIFFERENTIAL LOCK
Black to Orange 12.0 DC Volts 12.0 DC Volts
12.0 DC Volts
Black to White/
Green
11.5 DC Volts
0 DC Volts
0 DC Volts
Black to White/
Orange
11.5 DC Volts 11.5 DC Volts
0 DC Volts
