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 5. Test for Open Right-
Multiple Backhoe
Hand Tower Wiring Harness.
Operations (Pilot Controls)
Do Not Function Correctly -
1. Connect batteries (WP 0157) and
Continued
turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
2. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Proceed to
sure voltage between right-hand
Test Step 6.
tower wiring harness connector
Voltage Less Than 10 Volts - Proceed
(WP 0007, Figure 163) terminals 5
to Test Step 7.
and 7. Voltage should be 10 to 14
volts.
Test Step 6. Test for Open Pilot
Control Wiring Harness.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Remove rear floor cover plates
(WP 0306).
3. Disconnect pilot control wiring har-
ness connector (WP 0007, Figure
161) from right-hand tower wiring
harness connector (WP 0007, Fig-
ure 162).
4. Install a jumper between pilot con-
trol wiring harness connector (WP
0007, Figure 161) terminals C and
E.
5. Disconnect pilot control wiring har-
ness connector (WP 0007, Figure
160) from pilot control controller.
6. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between pilot con-
Replace right-hand tower wiring
trol wiring harness connector
harness (WP 0188).
(WP 0007, Figure 160) terminals 1
Proceed to Test Step 29.
and 2. Resistance should be 5.0
Resistance Greater Than 5.0 Ohms -
ohms or less.
Replace pilot controls wiring harness
(WP 0187).
Proceed to Test Step 29.
Test Step 7. Test for Open Right-
Hand Tower Wiring Harness.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Remove rear floor cover plates
(WP 0306).
0073-5
