New Holland T8010 Manual page 1351

Test point
1 Measure voltage at dome
lamp connector 102.
2 Measure voltage at in-line
splice between dome lamp
connector 102, and in-line
connector 13 terminal V.
3 Measure voltage at in-line
connector 13 terminal V.
4 Measure voltage at fuse
#19.
5 Measure voltage at fuse
#18.
6 Switch dome lamp to door
operation.
Measure voltage at
connector 101 of switch.
7 Remove electrical connector
100 from door switch.
Measure voltage at
connector 100.
8 Open door.
Measure resistance to
ground at terminal of door
switch.
9 Switch dome lamp to On
position.
Measure resistance from
dome lamp and switch
connector 103 to ground.
Section 55 - Electrical System - Chapter 1
B - Dome Lamp and Switch Circuit Test
Good Reading
12 volts
If good reading, go to test
point 6.
12 volts
If good reading, repair
open in 871C(R) circuit.
12 volts
If good reading, repair
open in 871C(R) circuit.
12 volts
If good reading, repair
open in 871A(R) circuit.
12 volts
If good reading, repair
open in J1(R) circuit.
12 volts
If good reading, go to next
test point.
12 volts
If good reading, go to next
test point.
Less than 1 ohm
If good reading, go to next
test point.
Less than 1 ohm
If good reading, dome
lamp and switch circuits
okay. If dome lamp does
not operate properly,
replace dome lamp and
switch assembly.
Possible Cause of Bad Reading
Open in unswitched B+ circuit.
Go to next test point.
Open in unswitched B+ circuit.
Go to next test point.
Open in unswitched B+ circuit.
Go to next test point.
Open in unswitched B+ circuit.
Go to next test point.
Open in 101H(R) circuit from
unswitched B+.
Bulb, or
Dome lamp and switch assembly.
Open in 715A(V) circuit.
Door switch, or
Ground connection of door switch.
Open in circuit from connector 103 to
ground.
55-1-170