YAMAHA COMMON WIRING COLOR CODES WIRE COLOR(S) FUNCTION COLOR SAMPLE BLACK GROUND RED BATTERY POSITIVE; SW3 Oil warning red light V4 YELLOW Ignition ON 12-volts; Four-stroke lighting coil BLUE Instrument lights, choke, choke circuit, Ground potential oil transfer, High speed Charge Coil GREEN Tachometer signal, lighting coil lead, knock sensor.. Outboard & Boat Engine Wiring Colors . Function. Yamaha: Honda. Suzuki: Johnson. Evinrude: Mercury. Battery Positive : Red . Red/Black : Red/Black .. First Color is the primary color of the wire. If there is a second color listed, it is the color of the trace.. Microsoft Word - Outboard Wire Colors Author: Wally Bell Created Date:
It is important to follow the wiring color codes specified in the diagram to ensure proper connections and avoid electrical problems. Overall, understanding the components and symbols in the wiring diagram is essential for anyone working on or troubleshooting the electrical system of a Yamaha outboard motor.. Here are some primary Yamaha wire colors. OUTBOARD WIRE COLOR CODE KEY Code Color Primary Usage B Black Ground (-12 Volts) R Red Battery Power (+12 Volts) CDI Charge Coil Y Yellow Main Switch Key On Power (+12 Volts) L Blue Dash Instrument Lights Power Choke Solenoid Power CDI Charge Coil