New Holland T8010 Manual page 1663

Section 55 - Electrical System, Controller - Chapter 6
STEP 5 - Check power at fuse 37
With the key switch on and the display not illuminate.
Remove fuse 37 and check for 12 volts.
-- OK - Go to Step 7.
-- NOT OK - Go to Step 6.
STEP 6 - Check controller relay (TMF/ICU controller relay #19)
The controller relay (#19) is located in the fuse compartment behind the operator seat.
Check relay ground supply wire.
Turn key on.
Check for power at Controller relay (#19) base. Remove relay and check for power at C255 terminal 2 and 3.
-- OK - Replace relay.
-- NOT OK - Failed wire 160 to ignition switch, or wire 102 to ring terminal 138.
STEP 7 - Check power and ground supply to the instrumentation controller
(Instrument Cluster).
Install fuse 37.
Remove the instrumentation controller.
Turn the key on.
Check connector CN2, pin 2 for 12 volts.
-- NOT OK - Replace the wire between fuse 37 and the instrumentation controller connector CN2, pin 2.
-- OK - Go to Step 8.
STEP 8 - Check the ground supply at connector CN2, pin 4
Check the ground supply at connector CN2, pin 4.
-- OK - Replace the instrumentation controller.
-- NOT OK - Correct grounding problem.
NOTE: If the problem is intermittent, one of the relays is starting to fail or has dirty contacts.
1
2
RI05G040
Fuse/relay compartment (behind operator seat)
1. TMF/ICU RELAY (#19) 2. CAB POWER RELAY
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