TM 9-2320-209-10-1 c. Electrical System. The electrical system (fig. 2-4) is a 24-volt dc system . Two 12-volt storage batteries are connected in series with the negative terminal grounded. The engine starter motor operates directly from the 24-volt source. The system uses a belt-driven, 24-volt generator having an output capacity of 25 amperes. A battery-generator indicator is located on the instrument panel. Wiring harnesses are used to carry current to operate equipment and accessories. Circuit breakers are included to protect circuits from overload. 1. 2. 3. 4. 5. 6. 7. Trailer coupling Horn button Gages and controls Regulator Manifold air heater ignition unit Starter 8. Lights 9. Generator 10. Oil pressure gage sending unit 11. Batteries 12. Ground strap 13. Fuel level gage sending unit Water temperature gage sending unit Figure 2-4. Electrical System Component Location 2-6