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TM 10-3930-643-20
ELECTRICAL SYSTEM TROUBLESHOOTING AND MAINTENANCE. (cont)
5-8.
Instrument Panel Troubleshooting. (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
O. HOURMETER DOES NOT OPERATE. (cont)
Step 4.
Test the continuity of the oil pressure sending unit. Connect
multimeter to the terminal on the switch.
If the multimeter needle does not move, the circuit does not have
continuity. Replace oil pressure sending unit, refer to paragraph
5-40.
Step 5.
Test the continuity of the wire assembly. Disconnect main
h a r n e s s f r o m i n t e r m e d i a t e h a r n e s s , a s s h o w n . C o n n e ct
multimeter to terminal and Pin A.
If the multimeter needle does not move, the circuit does not have
c o n t i n u i t y.
I d e n t i f y a s a d e f e c t i v e w i r e a n d c o n t a c t D i r e ct
Support.
Step 6.
Return M10A Forklift to original equipment condition.
5-64
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