What causes the brake lights not to illuminate when the Corolla is using cruise control?

[DelDerek]

The reasons why the brake lights do not illuminate when the Corolla is using cruise control include issues with the brake switch, brake light wiring, brake light bulbs, or a blown fuse in the circuit. Checking the brake light bulbs: The brake lights are the most frequently used lights on a car, and the bulbs have a relatively short lifespan. When the brake lights fail to illuminate, the first thing to consider is the brake light bulbs. Simply replacing the bulbs may solve the issue. Checking the brake light switch: If the brake light switch is faulty, none of the brake lights will illuminate. During inspection, you can use a wire to bridge the brake light switch. If the brake lights turn on, it indicates that the switch is defective, and replacing it will resolve the problem. Checking the fuse: If both the bulbs and the switch are confirmed to be functioning properly, the next step is to check the fuse. Some cars do not have a dedicated fuse for the brake lights and share a fuse with other electrical devices. In this case, you can check the operation of other electrical devices in the car. Identify any non-functioning devices and replace the corresponding fuse.