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 14. Test for Shorted Wiring
Multiple Backhoe
Harness.
Operations (Pilot Controls)
Do Not Function Correctly -
1. Disconnect pilot control wiring har-
Continued
ness connector (WP 0007, Figure
160) from pilot control controller.
2. Using a digital multimeter, test for
Continuity - Proceed to Test Step 15.
continuity between right-hand
No Continuity - Proceed to Test Step
tower wiring harness (WP 0007,
16.
Figure 163) terminals 3 and 7.
There should be no continuity.
Test Step 15. Test for Shorted Right-
Hand Tower Wiring Harness.
1. Remove rear floor cover plates
(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 - Replace pilot controls
continuity between pilot control
wiring harness (WP 0187). Replace
wiring harness connector (WP
pilot controls fuse (TM 5-2420-231-10).
0007, Figure 161) terminals C and
Proceed to Test Step 29.
E. There should be no continuity.
No Continuity - Replace right-hand
tower wiring harness (WP 0188).
Replace pilot controls fuse (TM 5-2420-
231-10).
Proceed to Test Step 29.
Test Step 16. Test for Shorted Wiring
Harness.
1. Remove rear floor cover plates
(WP 0306).
2. Disconnect pilot control relay (WP
0007, Figure 168) from pilot con-
trol wiring harness connector (WP
0007, Figure 167).
3. Disconnect pilot control wiring har-
ness connector (WP 0007, Figure
188) from pressure reducing valve
4. Disconnect pressure reducing
solenoid diode (WP 0007, Figure
189) from pilot control wiring har-
ness connector.
0073-9
