1978 Chevy Truck Wiring Diagram. It contains instructions and diagrams for various varieties of wiring methods along with other things like lights, home windows, and so forth. A circuit is generally composed by numerous components.

The schematic measures 8.5 x 11 when folded up, and opens up to 11 by 38. The diagram pictured is an example of this type when folded, but is not the actual diagram for your vehicle. It will help you to understand connector configurations, and locate & identify circuits, relays, and grounds.
