New Holland CX720 Repair Manual page 3962

A. If continuity is found, continue with step 9.
B. If no continuity is found, erase the fault codes and continue operation.
NOTE: The CCM module connects both sides of the circuit to ground when in neutral to "lock" the motor in
position. Power must be removed from the module prior to testing for short to ground condition on the motor
circuit to remove this ground path.
9. Disconnect connector X072. Use a multimeter to check for continuity between connector X072 pin P and chas-
sis ground.
A. If no continuity is found, the short to ground is in the lower frame rear (LR) harness between connector
X072 pin P and connector X228 pin E wire 789 gray. Locate the short and repair.
B. If continuity is found, continue with step 10.
10. Disconnect connector X025. Use a multimeter to check for continuity between connector X025 pin 14 and
chassis ground.
A. If continuity is found, the short to ground is in the expansion (EX) harness between connector X025 pin
14 and connector X013 pin J2-1 wire 785 gray. Locate the short and repair.
B. If no continuity is found, the short to ground is in the straw walker (SW) harness between connector X025
pin 14 and connector X072 pin J & P on one of the following wires :
Wire 785 gray, connector X025 pin 14 to harness splice
Wire 791 gray, harness splice to connector X072 pin J
Wire 789 gray, harness splice to connector X072 pin P
Visually inspect the harnesses for damage, bent or dislocated pins, corroded terminals or broken wires.
Locate the short to ground and repair.
11. Remove the Upper/lower sieve relay K18 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 12.
B. If no continuity is found, erase the fault codes and continue operation.
12. Disconnect connector X005. Use a multimeter to check for continuity between connector X005 pin 15 and
chassis ground.
A. If continuity is found, continue with step 13.
B. If no continuity is found, the short to ground is in the cab main (CM) harness between connector X005 pin
15 and the Upper/lower sieve relay K18 pin 3 on the fuse panel wire 786 red. Locate the short and repair.
13. Disconnect connector X219. Use a multimeter to check for continuity between connector X219 pin 1 and chassis
ground.
A. If continuity is found the short to ground is in the expansion (EX) harness between connector X219 pin 1
and connector X013 pin J2-21 wire 786 red. Locate the short and repair.
B. If no continuity is found, the short to ground is in the main frame (MF) harness between connector X005
pin 15 and connector X219 pin 1 wire 786 red. Locate the short and repair.
14. Fault codes indicate circuit fault due to open circuit condition. Disconnect the lower sieve motor connector X228.
Measure the resistance of the motor between terminals D and E . The correct resistance is 3 - 12 ohms.
A. The resistance is infinite, indicating an open condition in the motor. Replace the lower sieve motor.
B. The resistance is in specification. Continue with step 15.
15. Replace the Upper/lower sieve relay K18 on the fuse panel with a known good relay, and retest the upper sieve
circuit function.
A. If the lower sieve circuit now functions properly, the relay was faulty, and was not providing continuity
between terminals 3 & 5 when energized. Replace the relay.
CROP PROCESSING - CLEANING Primary cleaning
K.62.B / 250
2 4/7/2006