TM 5-2420-231-23-1
0081
Table 1. Backhoe Auxiliary Hydraulic Control Does Not Operate Correctly - Continued.
081
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. Using a digital multimeter, test for
Continuity - Replace pilot controls
Backhoe Auxiliary Hydraulic
continuity between pilot control
wiring harness (WP 0187).
Control Does Not Operate
wiring harness connector (WP
Proceed to Test Step 14.
Correctly - Continued
0007, Figure 219) terminal 6 and
No Continuity - Proceed to step 9.
terminal 3. 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 14.
0007, Figure 219) terminal 6 and
No Continuity - Proceed to step 10.
terminal 4. 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 14.
0007, Figure 219) terminal 6 and
No Continuity - Proceed to Test Step 8.
machine ground. There should be
no continuity.
Test Step 8. Test Pilot Control Wiring
Harness for Open.
1. Install a jumper wire between pilot
control wiring harness connector
(WP 0007, Figure 219) terminals 3
and 5.
2. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between pilot con-
Remove Jumper wire from pilot control
trol wiring harness connector (WP
wiring harness connector (WP 0007,
0007, Figure 160) terminals 2 and
Figure 219) terminals 3 and 5.
17. Resistance should be 5.0
Proceed to step 3.
ohms or less.
Resistance Greater Than 5.0 Ohms -
Replace pilot controls wiring harness
(WP 0187).
Proceed to Test Step 14.
3. Install a jumper wire between pilot
control wiring harness connector
(WP 0007, Figure 219) terminals 3
and 6.
4. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between pilot con-
Remove Jumper wire from pilot control
trol wiring harness connector (WP
wiring harness connector (WP 0007,
0007, Figure 160) terminals 2 and
Figure 219) terminals 3 and 6.
18. Resistance should be 5.0
Proceed to step 5.
ohms or less.
Resistance Greater Than 5.0 Ohms -
Replace pilot controls wiring harness
(WP 0187).
Proceed to Test Step 14.
0081-10