This is the electrical wiring diagram for the 1947 Chevrolet Light and Heavy Duty Trucks. The wiring diagram shows all electrical units and circuits, positions of electrical units which are shown diagrammatically and the wiring harness loom which is indicated by the cross hatched sections. The insulation of each wire is distinctively pattered and colored to assist in tracing circuits and making correct connections. Some components or units show here are: light switch, instrument light, dome lamp, gas gauge, ignition switch, horn button, beam indicator light, ignition switch light, voltage regulator, gas gauge tank unit, stop light switch, dimmer switch, tail & stop light, etc. Click on image to view it larger in a new tab.