Turn Signal & Running Light Relay Wiring Diagram - Pins 30, 85, 86, 87, 87a

This document is a hand-annotated wiring diagram combining a standard SPDT automotive relay illustration (labeled 'Figure 2', watermarked the12volt.com) with hand-drawn connections showing how to wire a light through the relay. The relay's five terminals are shown: 85, 30, 87a, 87, and 86, with an internal COIL and switching contact depicted. The annotations show a light (drawn in yellow at top) with its ground wire tied to a 'new ground,' which also connects to relay pin 85. The light's positive (+) lead ('to light +') connects to relay pin 30. From the 'existing harness' (circled in blue), the running lights wire (labeled 'brown harness +') connects to pin 87a, and the turn signal wire (labeled 'black harness +') connects to pins 87 and 86. A reader can learn how to use a relay to switch a single light between a running-light feed and a turn-signal feed — the turn signal energizes the relay coil (86) and feeds the contact (87), while the running-light feed sits on the normally-closed contact (87a), with pin 30 output going to the light. No vehicle year, make, model, or part numbers are stated in the document itself.