New Holland CX720 Repair Manual page 2975

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 Ignition "ON" Wiper Switch in "OFF".
Check for 12 volts at Wiper Switch
connector X135 (pin 3).
2 Wiper Switch in Intermittent position
Check for 12 volts at Wiper Switch
connector X135 (pin 1 and 6).
3 Wiper Switch in "RUN" position.
Check for 12 volts at Wiper Switch
connector X135 (pin 1).
4 Wiper Switch in "RUN" position.
Check for 12 volts at Wiper Switch
"ON" indicator connector X135 (pin
10).
5 Ignition "OFF".
"RUN" position.
Check for continuity to ground on
Wiper Switch connector X135 (pin
9).
Wiper system Relay - Testing (E.34.A.65.03 - G.40.A.20)
NOTE: The batteries must be fully charged and all connections clean and tight. Use a multimeter (DVOM) for these
tests. For battery testing and service, see the battery section in the service manual.
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 Ignition "ON".
Check for 12 volts at Wiper Relay
(pin 1).
2 Check for 12 volts at Wiper Relay
connector X000 (pin 3).
3 Ignition "OFF"
Check for continuity to Ground at
Wiper Relay (pin 2).
BODY AND STRUCTURE - USER PLATFORM
12 volts.
Go to next test point (2).
12 volts.
Go to next test point (3).
12 volts.
Go to next test point (4).
12 volts.
If good reading, power feed to illumi-
nation lamp operating correctly.
Wiper Switch in Continuity found.
If good reading, check for blown in-
dicator lamp or bad switch.
12 volts.
Go to next test point.
12 volts.
Go to next test point.
Less than 1 ohm.
Go to next test point.
CAUTION
WARNING
Expected Result
CAUTION
WARNING
Expected Result
2 4/7/2006
E.34.A / 13
Other Result (Possible Cause)
Replace bad switch.
Replace bad switch.
Replace bad switch.
Go to next test point (5).
Open circuit 296 (BK) between
Wiper Switch connector X135 (pin
9) and ground.
Other Result (Possible Cause)
Open circuit 123 (OR) between Igni-
tion Switch connector X068 (pin 4)
and Wiper Relay (pin 1).
Open circuit 70 (RD) between Fuse
#4 and Wiper Relay (pin 3).
Blown Fuse #4.
Open circuit 242 (BK) between
Wiper Relay (pin 2) and Ground.