New Holland CX720 Repair Manual page 1331

B. If fuse F-51 is okay, go to Step 6.
6. Turn the Road Light switch S-26 to the "Road" lights, "High Beam" position and inspect fuse F-51.
A. If fuse F-51 immediately fails, the short to ground is in one of the following wires:
wire 218 yellow, road light switch S-26 pin 4 to CM harness splice
wire 191 yellow, CM splice to High Beam relay K-04 pin 1.
wire 043 yellow, CM splice to High Beam indicator lamp E-10
Locate the short and repair.
B. If fuse F-51 is okay, go to Step 7.
7. Blow the horn by depressing the road light switch S-26, and inspect fuse F-51.
A. If fuse F-51 immediately fails, the short to ground is in wire 193 white, from the road light switch S-26 pin
9 to horn H-02. Locate the short and repair.
B. If fuse F-51 is okay, go to Step 8.
8. A. If both fuses are okay, and testing does not reveal any short to ground in the circuit, the fault is either
intermittent or is no longer valid. Erase the error code and continue operation.
Series 1238-1281
Wiring harness - Electrical schematic frame 33 (A.30.A.88-C.20.E.33)
Series 1238-1281
Wiring harness - Electrical schematic frame 34 (A.30.A.88-C.20.E.34)
Series 1238-1281
Wiring harness - Electrical schematic frame 35 (A.30.A.88-C.20.E.35)
DISTRIBUTION SYSTEMS - LIGHTING SYSTEM
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