New Holland WorkMaster 50 Service Manual page 869

8. Check the main relay K-9102 load-side wiring.
With the key in the OFF position, use a multimeter to perform the following continuity checks on the vehicle harness
(VE) side :
From
X-9129 pin 87
X-9129 pin 87
X-9129 pin 87
NOTE: Wiggle the harness during the check to promote an intermittent electrical connection.
A. If there is no continuity, there is an open circuit in the main relay K-9102 load-side wiring or fuse. Use the
appropriate service manual, if necessary, to locate and repair the shorted conductor or open fuse.
B. If there is continuity, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
9. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 02 – Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
Electrical systems - FAULT CODES
To
X-9102 pin K01
X-9102 pin K03
X-9102 pin K05
47866583_ 02/12/2015
55.12 [55.DTC] / 148
Value
There should be continuity.
There should be continuity.
There should be continuity.