INSTRUMENT SWITCH CIRCUIT.

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

D. INSTRUMENT SWITCH CIRCUIT.

Step 1. Disconnect both leads 27 from INST switch. Place red probe in lead 27

and ground black probe. Set MASTER switch ON. Check voltage in both

leads 27. If multimeter indicates no voltage in both leads 27, go to step 4

and connect leads 27 to INST switch. If multimeter indicates about 24

volts in one lead, connect lead 27 measuring about 24 volts to INST switch

and go to step 2. Set MASTER switch OFF.

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