Fog Light Relay Wiring Diagram - SPST Toggle, 20A Fuse, 12V (Ford Bronco)

This document is a simple hand-drawn/computer-drawn wiring diagram (watermarked "Adrianspeeder") showing how to wire auxiliary fog or driving lights using a standard 4-pin automotive relay. A SPST toggle switch controls the relay coil: one side of the toggle goes to ground and the other side connects to relay terminal 85, while terminal 86 receives switched power from the fused 12V feed. Battery power (12V) passes through a 20 amp fuse to relay terminal 30, and terminal 87 delivers output power to two lights wired in parallel, each with its own chassis ground. The diagram labels the relay terminals 30, 85, 86, and 87, identifies the 20 amp fuse ("20a"), the 12V battery source, the SPST toggle, and the lights. A reader can learn the correct relay pinout for adding fog/driving lights so that the toggle switch only carries low coil current while the fused battery feed carries the lamp load. The diagram was uploaded to a 1988 Ford Bronco gallery but contains no vehicle-specific year, make, or model information; it is a generic relay-based auxiliary lighting circuit applicable to most 12V vehicles.