TM 5-2420-231-23-1
0070
Table 1. Return-to-Dig Function Fails to Operate or Operates Improperly - Continued.
070
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 8. Test for Shorted Main
Return-to-Dig Function Fails
Chassis Wiring Harness.
to Operate or Operates
Improperly - Continued
1. Disconnect return-to-dig solenoid
harness connector from front main
chassis wiring harness connector
(WP 0007, Figure 226).
2. Using digital multimeter, test for
Continuity - Replace main chassis
continuity between front main
wiring harness (WP 0154).
chassis wiring harness connector
Install new return-to-dig fuse (TM 5-
terminal 2 (WP 0007, Figure 226)
2420-231-10).
and ground. There should be no
Proceed to Test Step 9.
continuity.
No Continuity - Proceed to step 3.
3. Using digital multimeter, test for
Continuity - Replace main chassis
continuity between front main
wiring harness (WP 0154).
chassis wiring harness connector
Install new return-to-dig fuse (TM 5-
terminal 2 and terminal 1 (WP
2420-231-10).
0007, Figure 226). There should
Proceed to Test Step 9.
be no continuity.
No Continuity - Replace return-to-dig
solenoid (WP 0262).
Install new return-to-dig fuse (TM 5-
2420-231-10).
Proceed to Test Step 9.
Test Step 9. Verify That Symptom Is
Resolved.
1. Connect all wiring harness con-
nectors.
2. If disconnected, connect batteries
(WP 0157).
3. Operate return-to-dig function (TM
Return-to-Dig Function Operates
5-2420-231-10).
Properly - Troubleshooting complete.
Return-to-Dig Function Fails to
Operate or Operates Improperly -
Repeat troubleshooting from the
beginning.
END OF WORK PACKAGE
0070-8