New Holland T8010 Manual page 1345

Instrumentation and Warning System Diagnostic Tests
NOTE: The batteries must be fully charged and all connections clean and tight. Use a multimeter (DVOM) for these
tests.
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.
A - Instrumentation and Warning System Power and Ground Supply Test
Test Point
1 Measure voltage at
instrument cluster
connector CN2 terminal
3.
2 Measure voltage at fuse
#16.
3 Ignition in Run position.
Measure voltage at
instrument cluster
connector CN2 terminal
2.
4 Measure voltage at fuse
#37.
5 Measure voltage at splice
C20 (Schematic section
21).
6 Measure voltage at TMF
controller relay connector
255F, terminal A5.
7 Measure resistance from
instrument cluster
connector CN2 terminal 4
to ground.
Section 55 - Electrical System - Chapter 1
Good Reading
12 volts
If good reading, go to test
point 4.
12 volts
If good reading, repair
open in 202A(R) circuit.
12 volts
If good reading, go to test
point 9.
12 volts
If good reading, repair
open in 203A(R) circuit.
12 volts
If good reading, repair
open in 160 circuit.
12 volts
If good reading, repair
open in 162B circuit.
Less than 1 ohm
If good reading,
Instrumentation and
Warning System power
and ground supply
circuits okay.
55-1-164
Possible Cause of Bad Reading
Open in unswitched B+ circuit.
Go to next test point.
Fuse #16, or
Open in 101A(R) circuit from
unswitched B+.
Open in unswitched B+ circuit.
Go to next test point.
Fuse #37, or
Open in unswitched B+ circuit.
Go to next test point.
Open in unswitched B+ circuit.
Go to next test point.
Controller Relay.
Open in circuit from connector CN2
terminal 4 to ground.