Colors of wires in car wiring
Constant power
* Red: Constant power, +12 V
* Yellow: Constant power, +12 V, via ignition switch
Ignition
* Blue: Ignition control wire
* Black-orange: Power when ignition is on
* Black and White: Ignition Ground
Lighting
*White: Front side lights
* Grey-black: Headlights
* Grey-red: Rear brake lights
* Green: Right turn signals
*Yellow-green: Left turn signals
*Brown: Side lights
* Blue-black: Driving lights
Body and ground
* Black: Ground (minus)
*Brown: Headlight ground
Accessories
* Purple: Power accessories
*Green-red: Windshield wipers
* Blue-yellow: Horn signal
* Green-green: Ignition switch
Sound system
* Grey-violet: Antenna booster
* Grey-blue: Rear seat speakers
*Yellow-red: Car radio memory
*Black and blue: Front panel speakers
*White-blue: Remote turn on amplifier
Sensors
*Pink-black: Speed sensor
*White-Green: Steering wheel position sensor
* Blue-white: Air temperature sensor
Additional colors
*Orange: Various control wires (varies depending on vehicle make/model)
*Pink: Various control wires (varies depending on vehicle make/model)
* Blue: Various control wires (varies depending on vehicle make/model)
Note: These are general color codes that are used on most vehicles. However, specific colors may vary depending on the make, model and year of the vehicle. Always check your specific vehicle’s service manual before performing any electrical work.