WARNING SWITCH CIRCUIT. (Cont) - TM-9-2350-238-20-10216

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Make sure MASTER switch is OFF before repairing

electrical circuits. Failure to observe this warning

could result in injury to personnel.

Step 3.

Disconnect lead 509 from engine oil low-pressure warning switch. Place

red probe in lead 509. Ground black probe. Set MASTER switch ON.

Set INST switch ON. If multimeter indicates about 24 volts, replace engine

oil low-pressure warning switch. Refer to page 2-626. If multimeter

indicates no voltage, go to step 4. Set MASTER switch OFF. Set INST

switch OFF.

Make sure MASTER switch is OFF before

repairing electrical circuits. Failure to observe

this warning could result in injury to personnel.

Step 4.

To access engine disconnect, remove hull transmission compartment

deck assembly. Refer to page 2-938. Disconnect wiring harness at

engine disconnect. Place red probe in plug socket N. Ground black

probe. Set MASTER switch ON. Set INST switch ON. If multimeter

indicates about 24 volts, repair lead 509 between engine disconnect and

engine oil low-pressure warning switch. Refer to page 2-371. If

multimeter indicates no voltage, repair lead 509 from engine disconnect to

driver's instrument (switch) panel disconnect. Refer to page 2-371. Set

MASTER switch OFF. Set INST switch OFF.

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