New Holland T8010 Manual page 1333

Charging System Symptom Chart
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.
IMPORTANT: DO NOT use a self-powered test light for any of these tests. Use of a self-powered test light can
cause damage to components in this system.
WARNING: 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.
Symptom
System not charging or
charging poorly. Battery goes
dead.
System overcharging
High or Low message and
symbol in reconfigurable
display
Section 55 - Electrical System - Chapter 1
Possible Cause
Alternator belt
B+ circuit
D+ circuit
Excitation control
Alternator
D+ circuit
Excitation Control
Alternator belt
B+ circuit
D+ circuit
Excitation control
Alternator
55-1-152
Reference/Test
See engine repair section of
Service Manual to replace or
adjust belt.
A - Charging System Output
Test, test points 2-4.
B - Excitation Circuit (D+) Test.
D - Instrument Cluster (ICU)
Excitation Control Test.
A - Charging System Output
Test, test points 4-6.
Check for short to power in
Excitation Circuit (D+).
D - Instrument Cluster (ICU)
Excitation Control Test.
See Engine Repair section of
Service Manual to replace or
adjust belt.
A - Charging System Output
Test, test points 2-4.
B - Excitation Circuit (D+) Test.
D - Instrument Cluster (ICU)
Excitation Control Test.
A - Charging System Output
Test.