TM 9-2350-287-20-12-19. TROUBLESHOOTING CHART (continued).f. GENERATOR.The generator circuit consists of the alternator, voltage regulator, rectifier, master relay, vehicle batteries, aircleaner/generator system relay switch, starter switch, generator system and fuel pumps relay, and circuitbreakers 4,5,6, and 7. The relationship of these components is shown in the diagram below.When the MASTER switch is turned ON, 24 vdc is supplied from the batteries through the master relay, throughcircuit 82/10 to the circuit breaker panels. Voltage is supplied to the voltage regulator C/B no. 7 (starter solenoidand glow plug circuit breaker). When engine is cranked and oil pressure reaches 4-8 psi, the oil pressureactuated air cleaner and generator switch closes, causing the fuel pump/generator relay to close. This closesa circuit in the voltage regulator and the alternator begins operating and supplying voltage to charge thebatteries and operate all electrical components of the vehicle.2-87
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