INSTRUMENT SWITCH CIRCUIT. (Cont) - TM-9-2350-238-20-10138

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 instrument (gage) panel wiring harness. Place red probe on

pin F (lead 27) of receptacle. Ground black probe. Set MASTER and

INST switches ON. If multimeter indicates no voltage, repair lead 27 from

INST switch to receptacle. Refer to page 2-371. If multimeter indicates

about 24 volts, repair lead 27 from disconnect to instruments. Refer to

page 2-371. Set MASTER and INST switches OFF. Connect wiring

harness.

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