New Holland T8010 Manual page 1356

Power Mirror 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.
A - Power Mirror Switch Power and Ground Supply Test
Test Point
1 Ignition in Run position.
Measure voltage at power
mirror switch connector
130 terminal 9.
2 Measure voltage at splice
between power mirror
switch connector 130
terminal 9 and in-line
connector 13 terminal W.
3 Measure voltage at fuse
#24.
4 Measure resistance from
power mirror connector
130 terminal 3 to ground.
Section 55 - Electrical System - Chapter 1
Good Reading
12 volts
If good reading, go to test
point 5.
12 volts
If good reading, repair
open in 870B(O) circuit.
12 volts
If good reading, repair
open in 870D(O) circuit.
Less than 1 ohm
If good reading, power
mirror switch power and
ground supply circuits
okay.
55-1-175
Possible Cause of Bad Reading
Open in circuit from switched B+.
Go to next test point.
Open in circuit from switched B+.
Go to next test point.
Fuse #24, or
Open in circuit from switched B+.
Go to next test point.
Open in circuit from power mirror
connector 130 terminal 3 to ground.