Common wire colors
* Black: Ground (minus)
*Red: Plus
*Yellow: Signal wire
* Blue: Control (eg lighting)
* Green: Logic (eg sensors)
*Orange: Power for accessories
*Brown: Power for headlights, etc.
Additional colors depending on the make and model of the car
Audi
* Purple: Intelligent systems
* Pink: Security systems
BMW
* Purple: Data cable on MOST bus
*Green: Lighting
Chevrolet
*Yellow with black stripe: Generator excitation cable
*Pink: Wiper control
Ford
*White: Ignition
*Blue with White Stripe: Dashboard Lighting
Honda
*Orange with white stripe: Motor control cable
* Pink with black stripe: Ignition
Toyota
*Orange with red stripe: Audio power cable
* Blue with yellow stripe: Airbag control
Volkswagen
*Brown with blue stripe: Tail light
* Gray with red stripe: Brake light
Note:
*These wire colors are general and may vary depending on the make, model and year of your vehicle.
*Always refer to the repair manual or wiring diagram for your specific vehicle before performing any electrical work.
*Use a voltage tester to confirm correct wire identification.