TM 5-2420-231-23-1
0072
Table 1. Backhoe Bucket Quick-Coupler Does Not Operate Correctly - Continued.
072
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Using a digital multimeter, mea-
Backhoe Bucket Quick-
Resistance 5.0 Ohms or Less -
sure resistance between side
Proceed to step 5.
Coupler Does Not Operate -
options wiring harness connector
Continued
Resistance Greater Than 5.0 Ohms -
(WP 0007, Figure 44) terminal A
Replace side options wiring harness
and side options wiring harness
(WP 0255).
connector (WP 0007, Figure 207)
Proceed to Test Step 7.
terminal 2. Resistance should be
5.0 ohms or less.
5. Disconnect rear main chassis wir-
ing harness connector (WP 0007,
Figure 25) from side console wir-
ing harness connector (WP 0007,
Figure 24) (WP 0170).
6. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between side con-
Proceed to step 7.
sole wiring harness connector (WP
Resistance Greater than 5.0 Ohms -
0007, Figure 24) terminal 3M and
Replace side console wiring harness
side console wiring harness con-
(WP 0170).
nector (WP 0007, Figure 45) termi-
Connect all wiring harness connectors.
nal A. Resistance should be 5.0
Install instrument panel right-side cover
ohms or less.
(WP 0176).
Proceed to Test Step 7.
7. Remove instrument panel front
covers (WP 0174).
8. Disconnect front main chassis wir-
ing harness connector (WP 0007,
Figure 6) from front console wiring
harness connector (WP 0007, Fig-
ure 5) (WP 0162).
9. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between rear main
Replace front console wiring harness
chassis wiring harness connector
(WP 0162).
(WP 0007, Figure 25) terminal 3M
Connect all wiring harness connectors.
and front main chassis wiring har-
Install instrument panel right-side cover
ness connector (WP 0007, Figure
(WP 0176).
6) terminal 3M. Resistance should
Proceed to Test Step 7.
be 5.0 ohms or less.
Resistance Greater Than 5.0 Ohms -
Replace main chassis wiring harness
(WP 0154).
Connect all wiring harness connectors.
Proceed to Test Step 7.
Test Step 4. Test Left Backhoe
Quick-Coupler Switch.
1. Ensure ignition switch is in the off
position (TM 5-2420-231-10) and
disconnect batteries (WP 0157).
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