Lighting System - New Holland CX720 Repair Manual

DISTRIBUTION SYSTEMS - LIGHTING SYSTEM
LIGHTING SYSTEM - Logical diagram (A.40.A - C.20.B.72)
The road light switch (1) on the CX combine is a multi-function switch that contains the following functions:
Road & Park lights
Turn signal switch
Horn
Head light "Dip" switch
The switch is a single, self-contained unit, and has its own harness which plugs into connector X256 on the cab main
harness at the base of the steering column.
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10010914_1146
Refer to Wiring harness - Electrical schematic frame 35 (A.30.A.88 - C.20.E.35).
Wiring harness - Electrical schematic frame 36 (A.30.A.88 - C.20.E.36).
The schematic symbol for the road light switch contains all these functions, which may provide some confusion when
troubleshooting a problem with one of the circuits passing through this switch.
Starting at the top left of the switch, the first stalk symbol (1) shows the turn signal switch. Power is provided from the
key switch "ign" terminal to pin 6. With the switch in a left turn position, power is sent through the switch to pin 3, and
out to the flasher module and CCM1. A right turn position would supply power through the switch to pin 2, and out to
the flasher module.
At the same location is the horn button (2) When the stalk is pressed inwards, connection is made between pin 8
(supplied from fuse F-51) and pin 9 to supply the horn circuit directly.
The second stalk symbol (3) indicates the headlight "Dip" switch, used to select high or low beams, or flash the high
beams. Power from pin 8 (supplied from fuse F-51) flows through the switch to pin 4 when the high beams are selected
or flashed, and out to the high beam indicator E-10 and to the high beam relay K-04. While the "Flash" position works
at all times, the high beam position only functions when the road lights are turned on, as described next.
The second symbol (4) on this stalk indicates the stalk may be rotated to select the parking lights and the road lights.
Power is supplied to pin 5 from fuse F-51. When the stalk is rotated to the first position, connection is made in the
switch to pin 1, and power flows through the switch to supply the marker (E-03, E-04) and tail (E-11, E-12) lamps.
When the stalk is rotated to the second position, a connection is also made to pin 4 or 7, depending on stalk position.
Power flows through the switch to engage the low beam relay K-05, or high beam relay K-04, to power the road lights.
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