New Holland T8010 Manual page 1335

Test point
1 Ignition in Off position.
Disconnect wiring from
alternator connector 86
(D+) and instrument
cluster connector 61.
Measure resistance
between connector 86 and
connector 61 terminal 1.
2 Measure resistance
between alternator
connector 86 and in-line
connector 395M, terminal
5.
3 Measure resistance
between in-line connector
395 terminal 5, and in-line
connector 60M terminal
10.
4 Measure resistance
between in-line connector
60M,terminal 10, and
instrument cluster
connector CN1, terminal 1.
Section 55 - Electrical System - Chapter 1
B - Excitation Circuit (D+) Test
Good Reading
Less than 1 ohm
If good reading, excitation
circuit wiring is okay.
Less than 1 ohm
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, check all
connectors for full
installation, loose,
corroded, pushed out, or
bent terminals.
55-1-154
Possible Cause of Bad Reading
Open 121E(Y) circuit between
alternator and instrument cluster.
Continue with next test point.
Open 121E(Y) circuit between
connector 86 and connector 395.
Open 121B(Y) circuit between
connector 395 and connector 60.
Open 121A(Y) circuit between
connector 60 and connector CN1.