TM 5-2420-231-23-1
0061
Table 1. 4-Wheel Drive (4WD) Does Not Engage - Continued.
061
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Using a digital multimeter, test for
Continuity - Install new 4WD fuse
4-Wheel Drive (4WD) Does
continuity between main chassis
(TM 5-2420-231-10).
Not Engage - Continued
wiring harness (WP 0007, Figure
Replace main chassis wiring harness
25) terminal 2B and machine
(WP 0154).
ground. There should be no
Proceed to Test Step 22.
continuity.
No Continuity - Install new 4WD fuse
(TM 5-2420-231-10).
Replace front console wiring harness
(WP 0162).
Proceed to Test Step 22.
Test Step 16. Test 4WD Solenoids
and Solenoid Control Circuits for an
Open or Short.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Disconnect powershift connector
wiring harness (WP 0007, Figure
20) from transmission controller
(WP 0168).
3. Using a digital multimeter, mea-
Resistance 26 to 30 Ohms - Replace
sure resistance between power-
transmission controller (WP 0168).
shift connector wiring harness
Proceed to Test Step 22.
connector (WP 0007, Figure 20)
Resistance Less Than 26 Ohms -
terminals J1 and B1. Resistance
Replace transmission (WP 0213).
should be 26 to 30 ohms.
Proceed to Test Step 22.
Resistance Greater Than 30 Ohms -
Proceed to Test Step 17.
Test Step 17. Test Directional
Solenoid Control Circuits and
Ground Circuit for an Open.
1. Remove front floor cover plate
(WP 0306).
2. Disconnect powershift wiring har-
ness (WP 0007, Figure 146) from
transmission (WP 0007, Figure
147) (WP 0167).
3. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Proceed to step 4.
shift connector wiring harness
Resistance Greater Than 5.0 Ohms -
connector (WP 0007, Figure 20)
Replace powershift wiring harness
terminal J1 and powershift wiring
(WP 0167).
harness connector terminal E (WP
Install front floor cover plate (WP 0306).
0007, Figure 146). Resistance
Proceed to Test Step 22.
should be 5.0 ohms or less.
0061-14