New Holland WorkMaster 50 Service Manual page 918

A. If there is continuity, there is a short to ground condition in the glow plug control circuit wiring in the vehicle
harness (VE). Use the appropriate service manual, if necessary, to locate and repair the grounded conductor.
B. If there is no continuity on all of the checks, continue with Step 4.
4. Replace the glow plug control module Z-9101, then use EST to check to see that this fault has been resolved.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
5. 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 01 – Power distribution and glow plugs (engine schematics)
(55.100.DP-C.20.E.01)
Electrical systems - FAULT CODES
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