12 Volt Relay Wiring Diagram | Free Wiring Diagram Assortment of 12 volt relay wiring diagram. A wiring diagram is a simplified traditional pictorial depiction of an electrical circuit. It reveals the components of the circuit as simplified shapes, and also the power and signal connections in between the tools. How to Read Relay Wiring Diagram | autocardesign How to Read Relay Wiring Diagram– wiring diagram is a simplified satisfactory pictorial representation of an electrical circuit shows the components of the circuit as simplified shapes, and the facility and signal friends amongst the devices. Overload Relay: Types, Connection Diagram and Applications Overload Relay Connection Diagram. The wiring diagram of an overload relay is shown below, and the connections of an overload relay symbol may seem like two opposite question marks otherwise like ‘S’ symbol. The overload relay working/function is discussed below. Relay Wiring Diagrams | the12volt Dozens of the most popular 12V relay wiring diagrams created for our site and members all in one place. If you need a relay diagram that is not included in the 76 relay wiring diagrams shown below, please search our forums or post a request for a new relay diagram in our Relay Forum.