Motorcycle ACC Wire Color Codes

Cheatsheet Content

ACC Wire Color Codes by Brand This section provides common color codes for Accessory (ACC) wires across various motorcycle brands. ACC wires typically provide switched 12V power, meaning they are active when the ignition is on. Honda Common ACC Colors: Brown (Br): Often used for switched 12V power to accessories. Black with Red Stripe (Bk/R): Can also be a switched power source, especially for ignition-related components. Black (Bk): Sometimes used for switched 12V, but also commonly for ground. Context is key. Notes: Honda wiring can vary significantly by model and year. Always consult the specific service manual. Suzuki Common ACC Colors: Orange (O): Very common for switched 12V power to accessories. Brown (Br): Also used in some models for switched power. Notes: Suzuki's use of orange for switched power is fairly consistent. Yamaha Common ACC Colors: Brown (Br): Widely used for switched 12V power. Red with White Stripe (R/W): Often used as a main switched power feed. Notes: Brown is a strong indicator for switched power on many Yamaha models. Kawasaki Common ACC Colors: Brown (Br): A primary color for switched 12V power. Red with Black Stripe (R/Bk): Can also be a switched power source. Notes: Kawasaki often uses brown for accessory power. KTM Common ACC Colors: Red with White Stripe (R/W): Frequently used for switched 12V power. Brown (Br): Also found providing switched power. Notes: KTM wiring can be more European in style; always cross-reference with model-specific diagrams. Skygo (Philippines-based brand) Common ACC Colors: Black (Bk): Often used for switched 12V power, especially from the ignition switch. Brown (Br): May also be used for switched accessories. Notes: As a regional brand, wiring might follow common Asian motorcycle standards, which can include black for switched power. Verification with a multimeter is highly recommended. Motorstar (Philippines-based brand) Common ACC Colors: Black (Bk): Similar to Skygo, black is frequently used for switched 12V from the ignition. Brown (Br): Can also be a switched accessory power wire. Notes: Similar to Skygo, expect wiring to align with general Asian motorcycle conventions. Always test with a multimeter. General Tips for Identifying ACC Wires Always Use a Multimeter: The most reliable method is to use a multimeter to test for 12V DC power that turns on/off with the ignition switch. Check for Continuity to Main Power: An ACC wire should show continuity to the main 12V battery positive when the ignition is on, and no continuity when off. Ground Wires: Typically Green (Honda, Suzuki, Yamaha), Black (Kawasaki, KTM, some Chinese brands). Battery Positive (Constant 12V): Usually Red (R) across most brands. Consult Wiring Diagrams: Always refer to the specific wiring diagram for your motorcycle model and year. This is the most accurate source of information. Test Before Connecting: Never assume a wire's function based solely on color. Always test with ignition on and off. Common Wire Color Abbreviations Abbreviation Color Typical Function (General) Bk Black Ground or Switched Power (variable) Br Brown Switched Power (ACC) G Green Ground L Blue Various (e.g., Headlight High Beam) Lb Light Blue Various (e.g., Turn Signal) O Orange Switched Power (ACC - Suzuki) R Red Battery Positive (Constant 12V) W White Various (e.g., Headlight Low Beam) Y Yellow Various (e.g., Headlight power, Stator output) Note: A slash (e.g., R/W) indicates a main color with a stripe of the second color.