New Holland CX720 Repair Manual page 2323

B. If there is continuity to ground, a short to ground is located in the cab main (CM) harness between con-
nector X005 and connector X015 wire 839 white. Locate the short and repair.
7. Use a multimeter to check for continuity between connector X010 pin 7 and chassis ground.
A. If there is no continuity to ground, a short to ground is located in wires 814 white, 839 white or 818 white
in the engine (EN) harness between connector X010 and connector X211 . Locate the short and repair.
B. If there is continuity to ground, a short to ground is located in the main frame (MF) harness between
connector X010 and connector X004 wire 814 white. Locate short and repair.
8. Remove the ignition switch panel in the cab, and unplug connector X066 from the cold start indicator E36 . Use
a multimeter to check for continuity between connector X066 pin 7 and chassis ground.
A. If there is continuity to ground, a short to ground in located in the cab main (CM) harness between con-
nector X066 and connector X004 wire 814 white. Locate short and repair.
B. If there is no continuity to ground, continue with step 9.
NOTE: Connector X004 on the side of the cab should still be disconnected.
9. Use a multimeter to check for continuity between connector X066 pin 9 and chassis ground.
A. If there is no continuity to ground, there is an open circuit in the cab main (CM) harness between connector
X066 and cab ground 3 wire 294 black. Locate open and repair.
B. If there is continuity to ground, continue with step 10.
10. Reconnect all harness connectors, except for connector X066 to the cold start indicator E36 and connector X211
to the grid heater relay K37 . Turn the key switch to the ON position. Use the InfoView monitor - "Diagnose info"
screen to manually power the grid heater circuit. Use the multimeter to check for 12 volts between connector
X211 pin 1 and chassis ground.
A. If 12 volts is not present continue with Step 11.
B. If 12 volts is found continue with Step 14.
11. Turn the key switch to the ON position. Use the InfoView monitor - "Diagnose info" screen to manually power the
grid heater circuit. Disconnect connector X010 . Use the multimeter to check for 12 volts between connector
X010 pin 20 and chassis ground.
A. If 12 volts is not present, continue with step 12.
B. If 12 volts is present, there is an open circuit in the engine (EN) harness between connector X010 pin 20
and the harness splice wire 839 white. Locate open and repair.
12. Key switch to the ON position. Use the InfoView monitor - "Diagnose info" screen to manually power the grid
heater circuit. Disconnect connector X005 . Use the multimeter to check for 12 volts between connector X005
pin 20 and chassis ground.
A. If 12 volts is not present, continue with step 13.
B. If 12 volts is present, there is an open circuit in the main frame (MF) harness between connector X010
pin 20 and connector X005 pin 20 wire 839 white. Locate open and repair
13. Key switch to the ON position. Use the InfoView monitor - "Diagnose info" screen to manually power the grid
heater circuit. Use the multimeter to check for 12 volts between connector X015 pin J1-12 and chassis ground.
A. If 12 volts is present, the open is between connector X005 pin 20 and connector X015 pin J1-12 wire
839 white.
B. If 12 volts is not present, replace the CCM2 controller.
14. Erase the fault code and continue operation.
A.
Series 1206-1347
Wiring harness - Electrical schematic frame 03 (A.30.A.88-C.20.E.03)
POWER PRODUCTION - STARTING SYSTEM
2 4/7/2006
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