The body featured a full 12-volt electrical system powered by an alternator. It supplied power to concealed four-beam headlights, parking/marker lights, brake lights, backup lights, instrument lights, electric windshield wipers, a single-speed heater blower, and a radio/public address system. With this equipment, the Boilermaker Special III was capable of day or night operation on most improved roads, including highways. The original headlight from Boilermaker Special I was installed on the back of the coal tender as a rear-facing safety light. It was later removed and installed as the headlight of the Boilermaker IV in 1979 (see below). A white block P was displayed on the front of the boiler directly below the large front headlight. The block P was mounted to a metal mesh screen which allowed external cool air to be drawn through the radiator by the engine's radiator fan.