Running Light + Turn Signal Combined via Two Relays - Wiring Diagram Schematic

This document is a hand-drawn style electrical schematic (not a fuse box chart) showing how to combine a vehicle's running lights and turn signal circuits to drive a single lamp using two relays. Two labeled inputs, "Running Lights" and "Turn Signal," feed a pair of SPDT relays, each shown with a coil, a normally closed (NC) contact, and a normally open (NO) contact. A single lamp (drawn in orange) is wired between ground and the common switch contact of the first relay. The Turn Signal circuit energizes the left relay's coil, while the Running Lights circuit feeds the left relay's NC contact and also relates to the right relay's coil circuit; the left relay's NO path routes through the right relay's contacts. Three chassis ground symbols are shown for the lamp return and each relay coil. A reader can learn the interconnection logic for making one bulb serve as both a running light and a turn signal — with the turn signal taking priority when active — a common setup for custom lighting, trailer wiring, or aftermarket LED conversions. The diagram contains no year, model, part numbers, wire colors, or fuse information.