New Holland CX720 Repair Manual page 1929

7. Disconnect inline connector X010. Use a multimeter to check for continuity between connector X010 pin 1 and
chassis ground.
A. If continuity is found the short to ground is in the main frame (MF) harness between connector X010 pin
1 and connector X016 pin J2-1 wire 524 gray. Locate the short and repair.
B. If no continuity is found, the short to ground is in the engine (EN) harness between connector X010 pin
1, the rotary screen brush motor connectorX206 pin B and connector X196 pin B on one of the following
wires:
Wire 524 gray, connector X010 pin 1 to harness splice
Wire 817 gray, harness splice to connector X206 pin B
Wire 828 gray, harness splice to connector X196 pin B
Visually inspect the harnesses for damage, bent or dislocated pins, corroded terminals or broken wires.
Locate the short to ground and repair.
8. Remove the Throttle/Brush relay K15 from the fuse panel. Use a multimeter to check for continuity between the
relay terminal 3 and chassis ground.
A. If continuity is found, continue with step 9.
B. If no continuity is found, erase the fault codes and continue operation.
9. Disconnect inline connector X004. Use a multimeter to check for continuity between connector X004 pin 26
and chassis ground.
A. If continuity is found the short to ground is in the main frame (MF) harness between connector X004 pin
26 and connector X016 pin J2-21 wire 525 gray. Locate the short and repair.
B. If no continuity is found, the short to ground is in the cab main (CM) harness between connector X004 pin
26 and the Throttle/Brush relay K15 pin 3 on the fuse panel.
10. Fault codes indicate circuit fault due to open circuit condition. Disconnect the rotary screen brush motor con-
nector X206. Measure the resistance of the motor between terminals A and B. The correct resistance is xx to
xx ohms.
A. The resistance is infinite, indicating an open condition in the motor. Replace the rotary screen brush motor.
B. The resistance is in specification. Continue with step 11.
11. Ensure that the batteries are connected using the battery key, and that fuse F23 is good. Use the multimeter to
check for continuity between connector X206 pin B and chassis ground.
A. If continuity is found, continue with step 13.
B. If no continuity is found, continue with step 12.
NOTE: The CCM module connects both sides of the circuit to ground when in neutral to "lock" the motor in
position, irregardless of key switch position, as long as it receives power through fuse F23. This ground path
may be used to test for an open circuit condition.
12. Disconnect inline connector X010. Use a multimeter to check for continuity between connector X010 pin 1 and
chassis ground.
A. If continuity is found the open circuit is in the harness between connector X010 pin 1 and connector X206
pin B . Locate the open and repair.
B. If no continuity is found, the open circuit is in the harness between connector X010 pin 1 and connector
X016 pin J2-1 on wire 524 gray. Locate the open and repair.
13. Use a multimeter to check for continuity between connector X206 pin A and chassis ground.
A. If no continuity is found, continue with step 14.
B. If continuity is found, recheck the motor for continuity at step 10. Erase the fault codes and continue
operation.
POWER PRODUCTION - FUEL AND INJECTION SYSTEM
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