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
12. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Proceed to
Backhoe Bucket Quick-
sure voltage between side options
Test Step 4.
Coupler Does Not Operate -
wiring harness connector (WP
Voltage Less Than 10 Volts - Proceed
Continued
0007, Figure 209) terminal 2 and
to step 13.
machine ground. Voltage should
be 10 to 14 volts.
13. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
14. Disconnect side options wiring har-
ness connector (WP 0007, Figure
207) from right backhoe quick-cou-
pler switch (WP 0007, Figure 208)
(WP 0172).
15. Remove right backhoe quick-cou-
pler switch (Figure 2, Item 3) from
rear instrument bezel (Figure 2,
Item 4).
16. Press and hold right backhoe
quick-coupler switch in the unlock
position.
17. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between right
Replace side options wiring harness
backhoe quick-coupler switch (WP
(WP 0255).
0007, Figure 208) terminals 2 and
Proceed to Test Step 7.
3. Resistance should be 5.0 ohms
Resistance Greater Than 5.0 Ohms -
or less.
Replace right backhoe quick-coupler
switch (WP 0172).
Proceed to Test Step 7.
18. Turn ignition switch to off position
(TM 5-2420-231-10).
Test Step 3. Test Backhoe Quick-
Coupler Switch Voltage Supply
Circuit for an Open
1. Ensure ignition switch is in the off
position (TM 5-2420-231-10) and
disconnect batteries (WP 0157).
2. Remove instrument panel right-
side cover (WP 0176).
3. Disconnect side options wiring har-
ness connector (WP 0007, Figure
44) from side console wiring har-
ness connector (WP 0007, Figure
45).
0072-6