New Holland CX720 Repair Manual page 1344

Turn/hazard light Electrical light - Testing (A.40.A.13.85 - G.40.A.20)
N° Test Point
1 Place Hazard Switch in the "ON" po-
sition.
Measure the voltage at RH Rear
Flashing Lamp connector X302 (pin
1).
2 Disconnect the RH Rear Flashing
Lamp.
Measure the resistance on circuit
635 (BK) between RH Rear Flash-
ing Lamp connector X302 (pin B)
and ground.
Turn/hazard light Flasher unit - Testing (A.40.A.13.86 - G.40.A.20)
NOTE: The batteries must be fully charged and all connections clean and tight. Use a multimeter (DVOM) or an
unpowered test light for these tests.
DO NOT use a self-powered test light for any of these tests. Use of a self-powered light can cause damage
to components in this system. M979
Before performing any of the electrical tests, be sure all operating controls are in neutral or park lock position.
This will eliminate accidental movement of the machine or start-up of power driven equipment. M980
N° Test Point
1 Measure for 12 volts at Flasher
Module connector X255 (pin 1).
2 Close the Hazard Switch. Measure
for 12 volts at Flasher Module con-
nector X255 (pin 2).
3 Place Road Light Switch in "LEFT"
turn position.
Measure for 12 volts at the Road
Light Switch connector X256 (pin 2).
4 Measure for 12 volts at Flasher
Module connector X255 (pin 7).
5 Place Road Light Switch in "RIGHT"
turn position.
Measure for 12 volts at the Road
Light Switch connector X256 (pin 3).
DISTRIBUTION SYSTEMS - LIGHTING SYSTEM
Expected Result
0 - 12 volts.
If good reading, go to test point 2.
Less than 1 ohm.
If good reading, replace the bulb.
CAUTION
WARNING
Expected Result
12 volts.
If good reading, go to next test point.
12 volts.
If good reading, go to next test point.
12 volts.
If good reading, go to next test point.
12 volts.
If good reading, go to next test point.
12 volts.
If good reading, go to next test point.
2 4/7/2006
A.40.A / 28
Other Result (Possible Cause)
Open circuit 622 (PU) between
Flasher Module (pin 3) and RH Rear
Flashing Lamp connector X302 (pin
1).
Short to ground on circuit 622 (PU)
between Flasher Module connector
X255 (pin 3) and RH Rear Flashing
Lamp connector X302 (pin A).
See test B-Flasher Module Test step
8. Go to next test point.
Open in circuit 635 (BK) between RH
Rear Flashing Lamp connector X302
(pin B) and ground.
Other Result (Possible Cause)
Open in power feed circuit between
Flasher Module connector X255 (pin
1) and Fuse #56. Short to ground,
which affect circuit between Flasher
Module connector X255 (pin 1) and
Fuse F-56 (see test A-Hazard Switch
Test, steps 1-4).
Open in circuit 207 (PU) between
Flasher Module connector X255 (pin
2) and Hazard Switch (pin 3).
Perform Hazard Switch Test.
Perform Road Light Switch Test.
Open in circuit 203 (PU) between
Flasher Module connector X255 (pin
7) and Road Light Switch connector
X256 (pin 2).
Perform Road Light Switch Test.