WIRING COLOR CODES


Here is a listing of common color codes for Yamaha outboard motors.
There is an industry-standard set of wire codes in general use by most manufacturers except Yamaha.
Colors listed here may vary with year & model but in general should be a good guide when tracing Yamaha wiring troubles.


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
ORANGE Trim position sensor
PINK Oil and overheat signal ground
WHITE Ignition stop circuit, SW1 oil transfer off position V4
BROWN Start circuit Low speed charge coil; Positive "+" potential
to oil transfer pump; SW2 transfer on position V4
GRAY Warning circuit lead; Over-rev control;
Four-stroke tachometer
SKY BLUE Trim Up
LIGHT GREEN Trim Down
YELLOW-RED STRIPE Diagnostic lead from ECU
PURPLE ECU groud to enrichment solenoid V76
BLACK/YELLOW STRIPE Thermo sensor
BLACK/RED STRIPE Remote oil tank ground return, PBS to tachometer,
Low speed charge coil
BLACK/WHITE STRIPE Ignition coil primary lead
GREEN/BLUE STRIPE Crank position sensor
GREEN/RED STRIPE Red oil warning light ground through SW3 in main tank oil
sensor to tachometer
GREEN/WHITE STRIPE Crank position sender; Lighting coil lead to rectifier
BLUE/GREEN STRIPE Main tank oil level sensor SW2 oil transfer circuit
BLUE/RED STRIPE Main tank oil level sensor SW3. No oil warning circuit
BLUE/WHITE STRIPE Main tank oil level sensor SW1; Oil transfer OFF circuit
BLUE-YELLOW STRIPE Shift cut switch
PURPLE-RED STRIPE OX66 #1 injector
PURPLE/BLACK STRIPE OX66 #2 injector
PURPLE/YELLOW STRIPE OX66 #3 injector
PURPLE/GREEN STRIPE OX66 #4 injector
PURPLE/BLUE STRIPE OX66 #5 injector
PURPLE/WHITE STRIPE OX66 #6 injector
RED/YELLOW STRIPE Key on power through fuel pump relay; power to ECU;
Fuel pump and fuel injectors
WHITE/RED STRIPE #1 pulser V6
WHITE/BLACK STRIPE #2 pulser V6
WHITE/YELLOW STRIPE #3 pulser V6
WHITE/GREEN STRIPE #4 pulser V6
WHITE/BLUE STRIPE #5 pulser V6
WHITE/BROWN STRIPE #6 pulser V6
YELLOW/WHITE STRIPE Electric fuel pump for electric carb system (ECS)
   

 

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