GENERATOR CHARGING CIRCUIT. (Cont) - TM-9-2350-238-20-10172

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Disconnect wiring harness at bulkhead disconnect. Check resistance

Step 11.

between plug pin A (lead 1) and ground. Check resistance between plug

pin B (lead 478) and ground. If multimeter indicates 0 to 4 ohms on pin A,

repair lead 1 between bulkhead disconnect and voltage regulator. Refer to

page 2-371. If multimeter indicates 0 to 4 ohms on pin B, repair lead 478

between bulkhead disconnect and voltage regulator. Refer to page

2-371. If multimeter indicates more than 4 ohms on pin A, repair lead 1

between bulkhead disconnect and engine disconnect. Refer to page

2-371. If multimeter indicates more than 4 ohms on pin B, repair lead 478

between bulkhead disconnect and engine disconnect. Refer to page

2-371. Connect wiring harness at bulkhead disconnect.

Step 12. Disconnect electrical lead at engine disconnect. Place red probe in socket.

Ground black probe. Start engine and run at 650 rpm. Check voltage and

stop engine. If multimeter indicates 24 to 29 volts, go back to step 7. If

multimeter indicates no or low voltage, go to step 13. Connect lead.

2-146