ABYC Boat Wiring Color Codes
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Electrical Supplies
ENGINE WIRING CROSS REFERENCE CHART FOR MOST OUTBOARD ENGINES
Circuit Mercury
PRE-1978
Mercury
1978 & UP
OMC Yamaha Force
PRE-1994
Force
1994 & UP
Suzuki Tohatsu
Power Red Red Red Red Red Red/Purple White Red
Ign. Switch White Purple Purple Yellow Blue Red/Blue Gray Red
Eng. Gnd. Black Black Black Black Black Black Black Black
Stop Circuit Orange Salmon
White
Black/Yellow Black/Yellow White White Black/Yellow Green/Red/
Blue
Brown
Eng. Start Yellow Yellow/Red Yellow/Red Brown Yellow Yellow/Red Brown/Yellow/
Red
Green
Tach Brown Gray Gray Green Purple Gray Yellow White
Battery Charge Yellow/Red Yellow
Yellow/Black
Yellow
Yellow/Black
Green Yellow Yellow
Yellow/Black
Yellow/Red Yellow/White
Stator CDI Power Red/White/
Blue(a)
Blue
Blue/White/Red
Red/White
Green/White
White/Green
Brown
Brown/Yellow
Brown/Black
Brown/White
Blue
Brown
Red
Black/Red
Blue/Yellow
Brown/Blue
Brown/Yellow
Blue
Blue/White
Red
Red/White
Green/White
White/Green
Green
Black/Red
Red
Choke Gray/Blue Yellow/Black Purple/White Blue Green Yellow/Black Orange Blue
Overheat Tan Tan Tan (b) Pink Orange Tan Green/Yellow Light Blue
(a) Ignition Driver Systems Only. All others were battery driven systems.
(b) The stripe color on the Tan wire indicates the temperature at which the sensory trips.
(c) The White/Black wire is the cold engine temp indicator and shorts to GND. at approx. 105 ° F.
ABYC RECOMMENDED BOAT WIRING COLOR CODES
Color
Function Comments
Yellow/Red Strips (YR)
Engine Start Circuit
Brown/Yellow Stripe (BY)
Bilge Blower Alternate color is Yellow (Y)
Yellow Stripe (Y)
Bilge Blower If used for DC negative, blower MUST be Brown/Yellow Stripe
Dark Gray (Gy)
Navigation Lights Fuse or Switch to lights
Dar Gray (Gy)
Tachometer
Brown (Br)
Generator/Alternator Charge Indicator Lights, Fuse or Switch to Pumps
Orange (O)
Accessory Power Ammeter to alternator output and accessory fuse or switches. Distribution Panel accessory switch.
Purple (Pu)
Ignition Instrument Power Ignition switch to coil and electrical instruments. Distribution Panel to electric instruments.
Dark Blue
Cabin and instrument lights Fuse or switch to lights.
Light Blue (Lt Bl)
Oil Pressure Oil sender to gauge
Tan
Water Pressure Temperature sender to gauge
Pink (Pk)
Fuel Gauge Fuel sender to gauge
Green/White Stripe
Tilt/Trim down or in Tile and Trim Circuits
Blue/White Stripe
Tilt/Trim up or out Tilt and Trim Circuits
To help you with your wire selection, please refer to the engine wiring cross reference chart
as well as the ABYC recommended boat wiring color codes below.
Premium Wire
32
16
2015
CATALOG BETTER THAN THE OEM
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