New Holland CX720 Repair Manual page 1345

N° Test Point
6 Measure for 12 volts at Flasher
Module connector X255 (pin 8).
7 Disconnect the Flasher Module.
Measure resistance on circuit 141
(BK) between Flasher Module con-
nector X255 (pin 6) and ground.
8 Reconnect the Flasher Module.
Place Hazard Switch in the "ON" po-
sition.
Measure for voltage at Flasher Mod-
ule connector X255 (pins 3 and 4).
9 Disconnect the Flasher Module.
Place a jumper wire across pins 1
and 4 of the Flasher Module connec-
tor X255.
10 Disconnect the Flasher Module.
Place a jumper wire across pins 1
and 3 of the Flasher Module connec-
tor X255.
11 Reconnect the Flasher Module.
Place Hazard Switch in the "ON" po-
sition.
Measure for voltage at Turn Indicator
connector X257 (pins 7 and 10).
12 Measure resistance on circuit 209
(BK) between Turn Indicator connec-
tor X257 (pin 9) and ground.
13 Measure 12 volts at Flasher Module
connector X255 (pin 5).
14 Disconnect the Flasher Module.
Place a jumper wire across pins 1
and 5 of the Flasher Module connec-
tor X255.
15 Measure resistance on circuit 221
(BK) between High Beam Indicator
connector X258 (pin 9) and ground.
16 Place Hazard Switch in the "ON" po-
sition.
Measure the voltage at Flasher Mod-
ule connector X255 (pin 10).
17 Disconnect the Flasher Module.
Place a jumper wire across pins 1
and 10 of the Flasher Module con-
nector.
DISTRIBUTION SYSTEMS - LIGHTING SYSTEM
Expected Result
12 volts.
If good reading, go to next test point.
Less than 1 ohm.
0 - 12 volts.
If good reading, go to test point 13.
LH flashing lamps illuminate.
If good reading, go to next test point.
RH flashing lamps illuminate.
If good reading, go to next test point.
0 - 12 volts.
If good reading, go to next test point.
Less than 1 ohm.
If good reading, go to next test point.
12 volts.
If good reading, go to text point 16.
High Beam Indicator illuminates.
If good reading, go to next test point.
Less than 1 ohm.
If good reading, check High Beam
Indicator.
0 - 12 volts.
If good reading, go to test point 17.
LH NASO Flashing Lamp illumi-
nates.
If good reading, go to next test point.
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Other Result (Possible Cause)
Open in circuit 202 (PU) between
Flasher Module connector X255 (pin
8) and Road Light Switch connector
X256 (pin 3).
Open in circuit 141 (BK) between the
Flasher Module connector X255 (pin
6) and ground.
Flasher Module.
Short to ground on circuit 199 (PU),
200 (PU), 195 (PU)or 196 (PU) be-
tween Flasher Module connector
X255 (pins 3 and 4) and Turn Indi-
cator and flashing lamps.
Go to next test point.
Short to ground will blow Fuse #56.
Repair short to ground.
Short to ground will blow fuse F-56.
Repair short to ground.
Open circuit 199 (PU) or 196 (PU)
between Flasher Module connector
X255 (pins 3 and 4) and Turn Indica-
tor connector X257 (pins 7and 10).
Turn Indicator
Open in circuit 141 (BK) between the
Flasher Module connector X255 (pin
6) and ground.
Flasher Module.
Short to ground on circuit 208 (PU)
between Flasher Module connector
X255 (pin 5) and High Beam Indica-
tor connector X258 (pin 7).
Go to next test point.
Short to ground on circuit 208 (PU)
will blow fuse F-56.
Repair short to ground between
Flasher Module connector X255 (pin
5) and High Beam Indicator connec-
tor X258 (pin 7).
Open circuit 221 (BK) between High
Beam Indicator connector X258 (pin
9) and ground.
Flasher Module.
Short to ground on circuit 243 (PU)
between Flasher Module connector
X255 (pin 10) and LH NASO Flash-
ing Lamp connector X242 (pin A).
Go to next test point.
Short to ground on circuit 243 (PU)
will blow Fuse #56.
Repair short to ground on circuit 243
(PU) between Flasher Module con-
nector X255 (pin 10) and LH NASO
Flashing Lamp connector X242 (pin
A).