New Holland CX720 Repair Manual page 1367

Cleaning shoe service light Switch - Testing (A.40.A.20.83 -
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
Test Point
N°
1 Measure the voltage at Sieve Light
Switch connector X237 (pin 2).
2 Close Sieve Light Switch.
Measure for 12 volts at Sieve Light
Switch connector X237 (pin 3).
Cleaning shoe service light Electrical light - Testing (A.40.A.20.85 -
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
Test Point
N°
1 Close Sieve Light Switch. Measure
for 12 volts at Sieve Light Switch
connector X237 pin 3).
DISTRIBUTION SYSTEMS - LIGHTING SYSTEM
CAUTION
WARNING
Expected Result
12 volts.
If good reading, go to next test point.
12 volts.
If good reading, switch is working
properly.
CAUTION
WARNING
Expected Result
12 volts.
If good reading, go to next test point.
2 4/7/2006
A.40.A / 51
Other Result (Possible Cause)
Blown Fuse #14
Open circuit 604 (OR) between
Sieve Light Switch connector X237
(pin 2) and Fuse #14.
Short to ground on circuit 604 (OR)
between Sieve Light switch connec-
tor X237 (pin 2) and Fuse #14.
A short to ground will blow the Fuse
#14.
Sieve Light Switch
Short to ground in circuit 610 (PU be-
tween Sieve Light switch connector
X237 (pin 3) and Sieve Light connec-
tor X234 (pin A).
A short to ground will blow the Fuse
#14.
Other Result (Possible Cause)
Perform Sieve Light Switch Test.