http://continuouswave.com/whaler/ref...rCode.html#OMC
Marine Wiring Color Codes
This article documents the color codes for wiring used in marine electrical applications. Information is available for:
•Evinrude/Johnson outboard motors
•Evinrude E-TEC outboard motors
•Mercury/Mariner outboard motors
•Yamaha outboard motors
•Honda outboard motors
Boston Whaler Boats
OMC Outboard Motors
The following color coded wiring is often seen in outboard motors manufactured by OMC. This information was developed by Jim Hebert from factory wiring diagrams. Unfortunately, these diagrams are completely lacking in annotation. The identification of the circuits involved was deduced by the author with the assistance of OMC master mechanic David Zammitt of Lockeman's Boat and Hardware.
A pictorial diagram of the typical OMC ignition switch wiring is available in a separate article. It illustrates the use of these wiring colors.
OMC Under-cowling Wiring
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(Based on V6 c.1992)
RED = Battery positive
RED with VIOLET stripe = Fused battery supply to ignition switch
BLACK = Battery negative
BLACK with YELLOW stripe = KILL Switch (grounded to stop engine)
YELLOW with RED stripe = START (Ignition switch to starter solenoid via safety switch)
VIOLET = Battery voltage in RUN or START from ignition switch
VIOLET with WHITE stripe = PRIMER solenoid
LT BROWN = ALARM (grounded on alarm)
GRAY = TACHOMETER pulses to gauge from Rectifier/Regulator
OMC Stator Coil / Timer Base Wiring
----------------------
YELLOW / YELLOW with GRAY stripe = Battery Charging Coil AC voltage
to Rectifier/Regulator Assembly
on Engine Block
BROWN / BROWN with YELLOW stripe = Charge Coil to Ignition Power Pack
BROWN / BROWN with BLACK stripe = Second Charge Coil to Ignition Power Pack
ORANGE / ORANGE with BLACK stripe = Power Coil to Ignition Power Pack
or OIS Module
Green / Violet / White = Timer Base to Ignition Power Pack
/ Black with White
OMC Power Trim and Tilt
-----------------------
RED = Battery positive
RED with VIOLET stripe = Fused battery supply to remote controls
BLUE = UP supply to MOTOR
BLUE with WHITE stripe = UP RELAY
GREEEN = DOWN supply to MOTOR
GREEN with WHITE stripe = DOWN RELAY
RED with WHITE stripe = Fused battery to remote switches
BLACK with TAN = Trim SENDER isolated ground
WHITE with TAN = Trim SENDER isolated fused battery positive
Evinrude E-TEC Outboard Motors
The following color coded wiring is often seen in E-TEC outboard motors manufactured by Evinrude. Where two colors are given the first is the main color of the wire insulation, the second is a color stripe identifier. For example, Yellow/White means a wire with Yellow insulation with a White identifier stripe. This information is also available in a color chart.
Stator
Yellow, Yellow/White = Phase 1
Orange, Orange/White = Phase 2
Brown, Brown/White = Phase 3System Check
Gray = Tachometer
Tan/Orange = Check Engine
Black = Ground
Tan/Black = Low Oil
Tan/Yellow = No Oil
Tan = OverheatKey Switch
Black/Yellow = Stop Circuit
Yellow/Red = Start Circuit
Black = Ground
Violet = Switch B+ 12-volts
Red/Violet = Fused B+
Black/Orange = BootstrapSystem
White/Red = 55 Volt
Black = Ground (NEG)
Red = 12 Volt (B+)
Brown/White = Starter Solenoid (V-Models only)Sensor Inputs
Red = Sensor 5V Supply, TPS, Oil, Water Pressure
Black = Analog Ground
Pink = Water Pressure CANbus
Pink/Green = Water in Fuel
Pink/Black = Cylinder Head Temperature
Pink/Blue = Intake Air Temperature
Tan/White = Oil Pressure
Green = TPS (Throttle Position Sensor)
Yellow = CPS (Crankshaft Position Sensor)
White = CPSCANbus
Red = CAN Source (voltage)
Black = CAN Common (voltage)
White = CAN High (data)
Blue = Can Low (data)Ignition
Orange/Blue = top
Orange/Violet = center
Orange/Green = bottomFuel Injection
Blue = top
Violet = center
Green = bottomPumps
Red/White = Fuel (90° V6 Models 2008 and newer)
Violet/Black = Fuel (V4 and V6 Models)
Brown = Fuel (Inline Models)
Blue = OilValves
Blue/Red = Water Valve - 55 V (Inline Models)
Red/Violet = Exhaust Valve - 12 V (V4 Models)
Black = Exhaust Valve - Ground (V4 Models)
Violet/Black = Exhaust Valve (V4 Models)
Blue/Black = Exhasut Valve (V4 Models)Trim & Tilt
Blue/White = Up
Green/White = Down
White/Tan = SenderMercury Outboard Wiring
The following color coded wiring is often seen in outboard motors with the Mercury or Mariner brand. This information was provided by Mercury Marine.
Table 3. Mercury/Mariner Standard Outboard Wiring Color Code, after a similar table from Mercury Marine. Color Function
Black All Ground
Brown Reference Electrode MerCathode System
Orange Anode Electrode MerCathode System
Lt. Blue/White Stripe Trim UP Switch
Lt. Green/White Stripe Trim DOWN Switch
Brown/White Stripe Trim Sender to Trim Gauge
Purple/White Stripe Trim "Trailer" Switch
Gray Tachometer Signal
Black/Yellow Stripe Shorting or Stop Circuit
Pink Fuel Sender to Gauge
Red Unprotected Wire from Battery
Red/Purple Stripe Protected (Fused) Wire from Battery
Red/Purple Stripe Protected (12 Volt +) to Trim Panel Control
Purple Ignition (Switch) to 12 Volt Positive
Tan Temperature Switch to Warning Horn
Tan Temperature Sender to Temperature Gauge
Tan/Blue Stripe Temperature Switch to Warning Horn
Yellow Starter Solenoid to Starter Motor
Yellow Stator to Regulator (Charging Circuit)
Yellow/Red Stripe Start Switch to Start Solenoid to Neutral Start Switch
Yellow/Black Stripe Choke (Enrichener System)
Green with Color Stripe Switch Box to Coil - Striped and Numbered
White/Black Stripe Bias Circuit (Switch Boxes)
Yamaha Outboard Wiring
This information was provided by secondary sources but is believed to be accurate.
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 = Starter 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 = Diagnostic lead from ECU
PURPLE = ECU groud to enrichment solenoid V76
BLACK/Yellow = Thermo sensor
BLACK/Red = Remote oil tank ground return, PBS to tachometer,
Low speed charge coil
BLACK/White = Ignition coil primary lead
GREEN/Blue = Crank position sensor
GREEN/Red = Red oil warning light ground through SW3 in main tank oil
sensor to tachometer
GREEN/White = Crank position sender; Lighting coil lead to rectifier
BLUE/Green = Main tank oil level sensor SW2 oil transfer circuit
BLUE/Red = Main tank oil level sensor SW3. No oil warning circuit
BLUE/White = Main tank oil level sensor SW1; Oil transfer OFF circuit
BLUE/Yellow = Shift cut switch
PURPLE/Red = OX66 #1 injector
PURPLE/Black = OX66 #2 injector
PURPLE/Yellow = OX66 #3 injector
PURPLE/Green = OX66 #4 injector
PURPLE/Blue = OX66 #5 injector
PURPLE/White = OX66 #6 injector
RED/Yellow = Key on power through fuel relay pump; power to ECU;
Fuel pump and fuel injectors
WHITE/Red = #1 pulser V6
WHITE/Black = #2 pulser V6
WHITE/Yellow = #3 pulser V6
WHITE/Green = #4 pulser V6
WHITE/Blue = #5 pulser V6
WHITE/Brown = #6 pulser V6
YELLOW/White = Electric fuel pump for electric carb system (ECS)
Honda Outboard Wiring
This information was provided by secondary sources but is believed to be accurate.
BLACK = Ground
BLACK/White = 12-volt power, Engine Start
BLACK/Red = Engine Stop
BLACK/Green = Stator, Ignition Coil
WHITE/Black = Ignition Switched Power
GRAY = Tachometer, Battery Charging
BROWN = Choke
RED = Temperature warning
Lt. GREEN = Trim UP
Lt. BLUE = Trim DOWN
BLUE = Pulse Coil 1
BLUE/Yellow = Pulse Coil 2
BLUE/Green = Pulse Coil 3, 4
Comments or Questions
If you have a comment or question about this article, please append it to this message thread in the Small Boat Electrical discussion area.
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Last modified: Friday, 05-Jun-2009 09:09:53 EDT
Author: James W. Hebert
This article first appeared July 21, 2002.
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