New Holland T8010 Manual page 1373

Starting System Diagnostic Tests
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.
Test Point
1 Measure voltage at ignition
switch connector 161
terminal 1.
2 Measure voltage at fuse
#7.
Test point
1 Remove electrical
connector 161 from
ignition switch.
While holding ignition
switch in Start position,
check for continuity from
connector 161 terminal 1
to terminal 2.
2 While holding ignition
switch in Start position,
check for continuity from
connector 161 terminal 1
to terminal 5.
3 Ignition switch in Run
position.
Check for continuity from
connector 161 terminal 1
to terminal 5.
Section 55 - Electrical System - Chapter 1
A - Ignition Switch Power Supply Test
Good Reading
12 volts
If good reading, ignition
switch power supply okay.
12 volts
If good reading, repair
open in 107A(R) circuit.
B - Ignition Switch Test
Good Reading
Continuity
If good reading, go to next
test point.
Continuity
If good reading, go to next
test point.
Continuity
If good reading, go to next
test point.
55-1-192
Possible Cause of Bad Reading
Open in circuit from unswitched B+.
Go to next test point.
Fuse #7, or
Open in 101C(R) circuit from
unswitched B+.
Possible Cause of Bad Reading
Ignition switch.
Ignition switch.
Ignition switch.