What is the purpose of a wiring diagram?

• A. To show electrical circuit connections
• B. To measure voltage
• C. To identify fuse amperage
• D. To indicate ground locations

Answer: (A)

Wiring diagrams are used to show how electrical circuit connections are laid out, mapping which wires go to which components and how power flows through the system. This lets you trace circuits, diagnose faults, and plan repairs by understanding where each wire runs, where connectors unite, and where grounds and returns are located. For example, you can follow power from the battery through switches and relays to a load, so a break or short becomes obvious on the diagram. While the diagram may show fuse locations or ground points, its main purpose is to illustrate the actual wiring connections and circuit paths, not to measure voltage or specify fuse amperage.