New Holland CX720 Repair Manual page 1307

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 in "OFF" position.
Disconnect Alternator connector (pin
R) and in-line connector X010.
Measure resistance between alter-
nator connector (pin R) and in-line
connector X010 (pin 9).
2 Check circuit 421 (YE) between
in-line connector X010 (pin 9) and
CCM-J2 (pin 36).
See Service Manual for testing of
CCM wiring.
DISTRIBUTION SYSTEMS - ELECTRICAL POWER SYSTEM
Less than 1 ohm.
If good reading, go to next test point.
If good reading, Alternator RPM cir-
cuit wiring okay.
CAUTION
WARNING
Expected Result
2 4/7/2006
A.30.A / 1127
Other Result (Possible Cause)
Open circuit in Alternator RPM circuit
421 (YE).
Check all connectors for full installa-
tion, loose corroded, pushed out, or
bent terminals.
Open 421(YE) circuit between in-line
connector X010 (pin 9) and CCM-J2
connector X017 (pin 36).