The colors of taillight wires typically correspond to specific signals and functions. Generally, the common wire colors and their meanings are as follows:
1. Red wire: Indicates the brake light. When the brake pedal is pressed, the red light illuminates to warn other vehicles that you are slowing down or stopping.
2. Yellow wire: Usually indicates the turn signal. When the vehicle is about to turn, the corresponding yellow turn signal lights up to indicate your intended direction to other vehicles.
3. White wire: May indicate the reverse light or other auxiliary lighting. When the vehicle is in reverse, the white reverse light illuminates to help the driver better observe the surroundings while backing up.