New Holland CX720 Repair Manual page 3929

B. If the motor coil resistance is within specification continue with Step 3.
4. Measure the resistance on connector X090 between pin A and chassis ground. Flex the lower frame and front
frame harnesses while making this check.
A. If no continuity to ground is found erase the fault code and continue operation.
B. If there is continuity to ground continue with Step 5.
5. Disconnect connector X023 . Use the multimeter to check for continuity between connector X023 pin 22 and
chassis ground.
A. If continuity is found continue with Step 6.
B. If no continuity is found the short to ground is in the lower frame harness between connector X023 and
connector X090 wire 763 white. Locate the short and repair.
6. Disconnect connector X031 . Use the multimeter to check for continuity between connector X031 pin 12 and
chassis ground.
A. If continuity is found the short to ground is in the cab main frame harness between connector X031 and
relay base K17 terminal 3 wire 763 white. Locate the short and repair.
B. If no continuity is found the short to ground is in the lower frame harness between connector X031 and
connector X023 wire 763 white. Locate the short and repair.
7. Fan and reverser operate in one direction only. Fault codes indicate a short to ground. Disconnect both the fan
adjustment motor connector X090 and reverser motor connector X080 .
A. Measure the resistance on connector X090 between pin A and pin B. The proper resistance range for the
coil is 1.0 - 5.0 ohms. If out of specification replace fan adjustment motor.
Measure the resistance on connector X080 between pin A and pin B. The proper resistance range for the
coil is 4.0 - 8.0 ohms. If out of specification replace reverser motor.
B. If the motor coil resistance is within specification continue with Step 8.
8. Check for continuity on connector X090 between pin B and chassis ground. Flex the lower frame and front
frame harnesses while making this check.
Next check for continuity on connector X080 between pin B and chassis ground. Flex the feeder frame and front
frame harnesses while making this check.
A. If no continuity to ground is found, erase fault code and continue operation.
B. If there is continuity to ground continue with Step 9.
9. Disconnect connector X023 . Use the multimeter to check for continuity between connector X023 pin 19 and
chassis ground.
A. If continuity is found continue with Step 10.
B. If no continuity is found the short to ground is in the lower frame harness between connector X023 and
connector X090 wire 761 gray. Locate the short and repair.
10. Disconnect connector X007 . Use the multimeter to check for continuity between connector X007 pin 2 and
chassis ground.
A. If continuity is found the short is between connectors X080, X090 and CCM1 connector X020 J3-6 wires
713, 761 or 770 gray in front frame harness.
B. If no continuity is found the short to ground is in the feeder harness between connector X007 and connector
X080 wire 770 gray. Locate the short and repair.
11. Fan does not operate in either direction. Fault code indicates an open in circuit. Disconnect the fan adjustment
motor connector X090.
A. Measure the resistance on connector X090 between pin A and pin B. The proper resistance range for the
coil is 1.0 - 5.0 ohms. If out of specification replace fan adjustment motor.
CROP PROCESSING - CLEANING Primary cleaning
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2 4/7/2006