Electric Fan Relay Wiring Diagram - E-Fan Control with Switch & Diode (RJM 2004)

This document is a simple color schematic titled "E-FAN CONTROL" showing how to wire an electric cooling fan using a relay. The diagram depicts an electric radiator fan (drawn as a fan blade in a shroud) connected through a fan relay. The relay's coil circuit is fed from the battery through a manual ON/OFF toggle switch, while the relay's high-current contacts feed battery power to the fan motor. A diode is shown wired across the fan/relay output to ground, presumably to suppress voltage spikes. Ground symbols are shown at the fan, battery, relay, and diode connections. The diagram is credited "Copyright 2004 RJM Injection Technologies, www.fordfuelinjection.com." A reader can learn the basic circuit topology for a switched relay-driven electric fan installation: battery power to the relay, a dash-mounted ON/OFF switch controlling the relay coil, the relay switching power to the fan, and a protective diode in the circuit. No wire gauges, wire colors, fuse ratings, relay pin numbers, or part numbers are given—it is a conceptual wiring layout rather than a detailed harness specification. No specific vehicle year, make, or model is identified in the diagram itself.