• RED: Primary POSITIVE “+” Power from Battery (may include non-fused sources)
  • BLACK (Sometimes Yellow): LOW VOLTAGE (12V) Ground
  • YELLOW with Red Stripe: Starter Activation (or solenoid activation) Circuit
  • BROWN: Used for Bildge or other Pump. (Some larger boats use for Generator regulator circuit)
  • BROWN with Yellow Stripe: Bildge Blower Circuit switched power
  • DARK BLUE: Dash Lighting Power.
  • LIGHT BLUE: Oil Pressure Sensor.
  • TAN: Engine Water Temperature (Note: Optimax this wire does NOT read engine temp)
  • ORANGE: Accessory Wiring, various Distribution Circuits
  • PURPLE: Key (Ignition) Switched 12V Power (example: PCM Wake or Ignition-Powered 12V Circuit)
  • PINK: Fuel Sender
  • GRAY: Tachometer Reference Wire.
  • GREEN or GREEN with Yellow Stripe: Bonding (Ground) wires (Example: Fuel tank or Fuel Fill bonding ground)