TM 5-2420-231-23-1
0061
Table 1. 4-Wheel Drive (4WD) Does Not Engage - Continued.
061
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. Using digital multimeter, measure
Voltage 8.5 to 10 Volts - Proceed to
4-Wheel Drive (4WD) Does
voltage between powershift wiring
Test Step 20.
Not Engage - Continued
harness connector (WP 0007, Fig-
Voltage Less Than 8.5 Volts - Replace
ure 202) terminal A and powershift
powershift wiring harness (WP 0167).
wiring harness connector (WP
Proceed to Test Step 22.
0007, Figure 200) terminal B. Volt-
age should be 8.5 to 10 volts.
Test Step 19. Test Brake Pressure
Switch Voltage Supply Circuit.
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. Install a jumper wire between pow-
ershift wiring harness connector
(WP 0007, Figure 202) terminal A
and machine ground.
4. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Remove jumper wire from powershift
shift connector wiring harness
wiring harness connector (WP 0007,
connector (WP 0007, Figure 20)
Figure 202) terminal A and machine
terminal K2 and machine ground.
ground.
Resistance should be 5.0 ohms or
Proceed to step 5.
less.
Resistance Greater Than 5.0 Ohms -
Replace powershift wiring harness (WP
0167).
Proceed to Test Step 22.
5. Using a digital multimeter, test for
Continuity - Replace powershift wiring
continuity between powershift con-
harness (WP 0167).
nector wiring harness connector
Proceed to Test Step 22.
(WP 0007, Figure 20) terminal K2,
No Continuity - Replace transmission
all other terminals on wiring har-
controller (WP 0168).
ness, and machine ground. There
Proceed to Test Step 22.
should be no continuity.
Test Step 20. Test Brake Pressure
Switch Series Circuit.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
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