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TM 9-2320-279-20-1
Troubleshooting Malfunctions (Cont)
Tab/e 2-9. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
Step 1.
Check for defective engine speed control wiring. Disconnect plug from engine high idle as-
sembly. Set multimeter to test for 24 Set Set ENGINE and PTO ENGAGE switches to ON
and crane POWER switch to OFF. Place negative (-) probe in socket No. 4 and touch posi-
tive (+) probe to PIN No. 1. Meter should show 24 vdc.
If meter does not show 24 vdc, trace wiring and find problem. Refer to FO-1, Electric
Diagram.
Check for defective crane power wiring. Disconnect plug from engine high idle assembly,
Step 2.
Set multimeter to test for 24 vdc. Set crane POWER switch to ON. Place negative (-)
probe in socket No. 4 and positive (+) probe to PIN No. 2. Meter should show 24 vdc.
If meter does not show 24 vdc, repair No. 310 wire to crane junction box. If problem
is not solved, report problem to the supervisor.
Change 3

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