TM 5-2420-231-23-1
0073
Table 1. Multiple Backhoe Operations (Pilot Controls) Do Not Function Correctly - Continued.
073
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Disconnect pilot control wiring har-
Multiple Backhoe
ness connector (WP 0007, Figure
Operations (Pilot Controls)
161) from right-hand tower wiring
Do Not Function Correctly -
harness connector (WP 0007, Fig-
Continued
ure 162).
4. Connect batteries (WP 0157) and
turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
5. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Replace right-
sure voltage between pilot control
hand tower wiring harness (WP 0188).
wiring harness connector (WP
Proceed to Test Step 29.
0007, Figure 161) terminals A and
Voltage Less Than 10 Volts - Proceed
E (ground). Voltage should be 10
to Test Step 8.
to 14 volts.
Test Step 8. Test for Open Pilot
Control Wiring Harness.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Disconnect pilot control wiring
harness connector (WP 0007,
Figure 159) from main chassis
wiring harness connector (WP
0007, Figure 158).
3. Connect batteries (WP 0157) and
turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
4. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Replace pilot
sure voltage between main chas-
controls wiring harness (WP 0187).
sis wiring harness connector (WP
Proceed to Test Step 29.
0007, Figure 158) terminals A and
Voltage Less Than 10 Volts - Proceed
B (ground). Voltage should be 10
to Test Step 9.
to 14 volts.
Test Step 9. Check for Open Front
Console Wiring Harness.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Remove instrument panel front
cover (WP 0174).
3. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from main chassis wiring
harness connector (WP 0007, Fig-
ure 6).
4. Remove pilot controls fuse (TM 5-
2420-231-10).
0073-6