Automotive 5-Pin Relay Wiring Diagram - SPST Switch, Pins 30 85 86 87 87A

This document is a simple color-coded wiring diagram showing how to wire a standard 5-pin automotive relay (pins 30, 85, 86, 87, and 87A) with an SPST on/off toggle switch and a 12-volt battery to control two indicator lamps. One lamp, connected to the relay's normally-closed pin 87A, is labeled 'On with switch Off' (yellow bulb), while the second lamp, connected to the normally-open pin 87, is labeled 'On with switch On' (green bulb). Power wires are drawn in red running from the battery positive terminal to the relay's pin 30 (common) and through the SPST switch to the relay coil (pins 85/86). Four separate ground points are shown in dark/black wiring: one for the battery, one for each lamp, and one for the relay coil. The diagram illustrates the basic principle of using a relay's normally-open and normally-closed contacts, making it a general-purpose reference for wiring auxiliary lighting, fans, or other accessories. It is not vehicle-specific; no year, make, model, part numbers, fuse ratings, or wire gauge specifications appear in the drawing. A caption line at the bottom of the image is cut off and unreadable.