What is the working principle of the Honda Civic's four-wire brake light switch?
1 Answers
Here is an introduction to the working principle of the Honda Civic's four-wire brake light switch: 1. The four wires of the car brake light switch: one is a 12-volt power supply, the other two are brake signal wires to the ABS system ECU and automatic transmission ECU respectively; another one goes to the rear brake indicator light. 2. The function of the brake light: In some high-end models, the ABS and automatic transmission share one wire, and an additional brake signal wire is added for the electronic suspension control; therefore, among the several wires on the brake light switch, except for one power wire, the others all go to the control units that require brake signals, while the rear brake indicator light is controlled by the vehicle lighting system.