TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 70 of 890
TM 9-2320-280-20-1 1-21. STARTING SYSTEM OPERATION The starting system is identical for all vehicles covered in this manual, and consists of the following components and circuits. ROTARY SWITCH - When in "START” position, provides battery power to the starter solenoid and to the neutral start switch through circuit 14. NEUTRAL STARTER SWITCH - When transmission shift lever is in "N" (neutral) position, this switch closes a relay in the protective control box through circuit 14 allowing battery power to reach the starter solenoid. PROTECTIVE CONTROL BOX - Locks out the starter circuit, which prevents starter from reengaging while engine is running. STARTER SOLENOID - A magnetic relay that transmits 24-volt battery power to the starter motor. STARTER MOTOR - Cranks the engine for starting, and is supplied 24-volt battery power through circuit 6A. 1-40