New Holland T8010 Manual page 1369

Test point
6 Check seat height
adjustment power and
grounds.
Perform A - Seat System
Power and Ground Supply
Test, test points 1, 2, 10,
and 11.
C - Operator Presence Switches Circuit Test
Test point
1 Separate electrical connector
133F and 133M.
While sitting in operator seat,
check for continuity between
connector 133F terminals 5
and 6.
2 Check for continuity between
connector 133M terminals 5
and 6 with operator seat
empty.
3 Check operator presence
switches power supply.
Perform A - Seat System
Power and Ground Supply
Test, test point 3.
4 Remove electrical connector
CN1 from instrument cluster.
Check for continuity from
connector CN1 terminal 2 to
connector 133 terminal 6.
Section 55 - Electrical System - Chapter 1
B - Height Adjustment Circuit Test
Good Reading
If power and ground
supplies okay, seat height
adjust switch and air pump
compressor circuits have
continuity, but height
adjustment does not
operate, replace seat air
pump compressor.
Good Reading
Continuity
If good reading, go to next
test point.
Open circuit
If good reading, go to next
test point.
If power supply circuits
okay, go to next test point.
Continuity
If good reading, operator
presence switches and
circuits okay. Replace
instrument cluster
55-1-188
Possible Cause of Bad Reading
Open in seat power and ground supply
circuits.
Possible Cause of Bad Reading
Open in operator presence switches
and/or circuits within seat assembly.
Short in operator presence switches
and/or circuits within seat assembly.
Open in circuit from switched B+.
Open in 303A(T) circuit.