Hand-Drawn Side Camera Relay Wiring Diagram - Ford F-550 Dual Camera Recorder

This is a hand-drawn, single-page wiring diagram sketched in ink on lined notebook paper, uploaded to a 2015 Ford F-550 gallery. It depicts a custom side-camera video system using two standard 5-pin automotive relays (labeled "left relay" and "right relay," each with pins 86, 87, 87A, 30, and 85), a video recorder with + and − terminals protected by an in-line fuse, and a three-position "side camera activation switch." Input lines at the top are labeled "switcher power," "Trigger," "Right camera input" (blue wire), and "left camera input" (light blue wire). The relays route the left and right camera video feeds, switched by the activation switch and trigger circuit, into the recorder/switcher. All negative/85 connections tie to a common ground bus. A reader can learn the intended pin-by-pin relay hookup for switching two side cameras into a single video recorder, which relay pins receive the camera inputs and trigger signals, and that the recorder's positive lead is fused. No vehicle year, model, part numbers, wire gauges, or fuse amperage values are stated on the drawing itself; it is a generic add-on camera wiring plan rather than a factory diagram.