TM 5-2420-231-23-1
0080
Table 1. Stabilizers and Backhoe Auxiliary Hydraulic Controls Do Not Operate - Continued.
080
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Disconnect pilot control wiring har-
Stabilizers and Backhoe
ness connector (WP 0007, Figure
Auxiliary Hydraulic Controls
219) from LH tower wiring harness
Do Not Operate - Continued
connector (WP 0007, Figure 220).
4. Disconnect pilot control wiring har-
ness (WP 0007, Figure 160) from
pilot control controller (WP 0187).
5. Remove stabilizer control switches
(WP 0190).
6. Inspect each wiring harness con-
One or More Wiring Harness
nector for damage and deformed
Connectors Cracked, Damaged, or
Deformed - Replace pilot controls
connector body.
wiring harness (WP 0187).
Proceed to Test Step 5.
Wiring Harness Connectors OK -
Proceed to step 7.
NOTE
Loose or corroded terminals will cause this symptom and are difficult to
identify and diagnose. Replace wiring harness if terminals are suspected.
7. Inspect terminals at each wiring
One or More Terminals Deformed, or
harness connector for deformed or
Corroded - Replace pilot controls
loose connection, and corrosion.
wiring harness (WP 0187).
Proceed to Test Step 5.
Wiring Harness Connectors OK -
Proceed to step 8.
8. Using a digital multimeter, test for
Continuity - Replace pilot controls
continuity between pilot control
wiring harness (WP 0187).
wiring harness connector (WP
Proceed to Test Step 5.
0007, Figure 169) terminals B and
No Continuity - Proceed to step 9.
A. There should be no continuity.
9. Using a digital multimeter, test for
Continuity - Replace pilot controls
continuity between pilot control
wiring harness (WP 0187).
wiring harness connector (WP
Proceed to Test Step 5.
0007, Figure 169) terminals B and
No Continuity - Proceed to step 10.
C. There should be no continuity.
10. Using a digital multimeter, test for
Continuity - Replace pilot controls
continuity between pilot control
wiring harness (WP 0187).
wiring harness connector (WP
Proceed to Test Step 5.
0007, Figure 171) terminals B and
No Continuity - Proceed to step 11.
A. There should be no continuity.
11. Using a digital multimeter, test for
Continuity - Replace pilot controls
continuity between pilot control
wiring harness (WP 0187).
wiring harness connector (WP
Proceed to Test Step 5.
0007, Figure 171) terminals B and
No Continuity - Proceed to step 12.
C. There should be no continuity.
0080-6
