Illustration detail of how to construct a wiring diagram of a 7. 3 Powerstroke alternator means explaining relationships of essential components using narration. The diagram normally consists of a battery, starter relay, alternator, speedometer, or any other controlling device for the instrument cluster, charge light bulb, fusible links, and fuses or fuse box. Battery is the main supply source and to start the process of cranking the engine there is a starter relay that engages the starter motor. The alternator is the device that turns mechanical energy into electrical energy for charging the battery and powering electrical devices in the car. Some of the vehicle information displayed on the instrument cluster includes mileage, oil pressure, and voltage among others; charge indicator. This gives drivers a clue on whether the battery is being charged. The fusible links and the fuse box aid in the preservation of the electrical system from excess current.
