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
Test Step 11. Test for Shorted Right-
Multiple Backhoe
Hand Tower Wiring Harness.
Operations (Pilot Controls)
Do Not Function Correctly -
1. Remove rear floor cover plates
Continued
(WP 0306).
2. Disconnect pilot control wiring har-
ness connector (WP 0007, Figure
161) from right-hand tower wiring
harness connector (WP 0007, Fig-
ure 162).
3. Using a digital multimeter, test for
Continuity - Proceed to Test Step 12.
continuity between pilot control
No Continuity - Replace right-hand
wiring harness connector (WP
tower wiring harness (WP 0188).
0007, Figure 161) terminals A and
Replace pilot controls fuse (TM 5-2420-
E. There should be no continuity.
231-10).
Proceed to Test Step 29.
Test Step 12. Test for Shorted Pilot
Control Wiring Harness.
1. Disconnect pilot control wiring har-
ness connector (WP 0007, Figure
159) from main chassis wiring har-
ness connector (WP 0007, Figure
158).
2. Using a digital multimeter, test for
Continuity - Proceed to Test Step 13.
continuity between main chassis
No Continuity - Replace pilot controls
wiring harness connector (WP
wiring harness (WP 0187).
0007, Figure 158) terminals A and
Replace pilot controls fuse (TM 5-2420-
B. There should be no continuity.
231-10).
Proceed to Test Step 29.
Test Step 13. Test for Shorted Front
Console Wiring Harness.
1. Remove instrument panel front
cover (WP 0174).
2. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from main chassis wiring
harness connector (WP 0007, Fig-
ure 6).
3. Using a digital multimeter, test for
Continuity - Replace front console
continuity between front console
wiring harness (WP 0162).
wiring harness connector (WP
Replace pilot controls fuse (TM 5-2420-
0007, Figure 5) terminal 5N and
231-10).
machine ground. There should be
Proceed to Test Step 29.
no continuity.
No Continuity - Replace main chassis
wiring harness (WP 0154).
Replace pilot controls fuse (TM 5-2420-
231-10).
Proceed to Test Step 29.
0073-8
