What are the four wires of the brake light switch?
1 Answers
Four-wire brake light switch respectively are: one is the 12-volt power supply, one is the brake signal wire for the ABS system ECU (ECU is the electronic control unit, also called the vehicle computer), one is the brake signal wire for the automatic transmission ECU, and one is the wire to the rear brake indicator light. Below is relevant information about the brake light: 1. Reminder function: The brake light is the light that turns on when the vehicle brakes. It is generally red and serves to warn the vehicles behind. The brake light is bright and quite noticeable, mainly used to alert the vehicles behind that this vehicle is slowing down or stopping. 2. Preventing rear-end collisions: If the brake light is used incorrectly or malfunctions, it can easily cause rear-end collision accidents.