New Holland T8010 Manual page 1340

Test point
6 Measure voltage at rotary
switch connector 12,
terminal HL.
7 Rotary switch in fourth
position.
Measure voltage at rotary
switch connector 12,
terminal W.
8 Measure voltage at rotary
switch connector 12,
terminal HL.
9 Measure voltage at rotary
switch connector 12,
terminal R.
Test point
1 Measure voltage at
electronic flasher
connector 135 terminal 8.
2 Measure voltage at fuse
#20.
3 Measure resistance from
electronic flasher
connector 135 terminal 6
to ground.
4 Headlight switch in any
position (except Off).
Measure voltage at
electronic flasher
connector 135 terminal 3.
Section 55 - Electrical System - Chapter 1
Work Lamp Switch Test
Good Reading
12 volts
If good reading, go to next
test point.
12 volts
If good reading, go to next
test point.
12 volts
If good reading, go to next
test point.
12 volts
If good reading, rotary
switch is operating
properly.
Electronic Flasher Test
Good Reading
12 volts
If good reading, go to test
point 3.
12 volts
If good reading, repair
open in 766(R) circuit.
Less than 1 ohm
If good reading, go to next
test point.
12 volts
If good reading, go to next
test point.
55-1-159
Possible Cause of Bad Reading
Rotary switch
Rotary switch
Rotary switch
Rotary switch
Possible Cause of Bad Reading
Open in unswitched B+ supply circuit.
Go to next test point.
Fuse #20, or
Open in 766 circuit from unswitched B+.
Open in circuit from connector 135
terminal 6 to ground.
Open in 707(K) circuit.