TM 9-2320-361-20 1-20. ELECTRICAL SYSTEMS OPERATION (Contd) b. Starting System Operation. STARTER SWITCH - Connects 24-volt battery power to starter motor when pressed. STARTER RELAY - A magnetic switch, actuated by starter switch that allows 24-volt battery power to flow to starter motor. STARTER SOLENOID - Actuates starter motor gear to crank vehicle engine. STARTER MOTOR - Cranks vehicle engine for starting when supplied with 24-volt battery power. 1-57