New Holland T8010 Manual page 1370

D - Heater Switch and Relay Power and Ground Supply Test
Test point
1 Ignition in Run position.
Measure voltage at seat
connector 133 terminal 7.
2 Measure voltage at fuse
#29.
3 Measure voltage at splice
C21.
4 Measure resistance from
seat connector 133
terminal 8 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 259A(R) circuit.
12 volts
If good reading, replace
fuse #29, or repair open in
102J(R) circuit.
Less than 1 ohm
If good reading, heater
switch and relay power and
ground supplies okay.
55-1-189
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.
Open in 102B(R) circuit from switched
B+.
Open in circuit from seat connector 133
terminal 8 to ground.