To find the brake switch on a car, look underneath the dashboard and locate the brake pedal. The brake switch is typically located near the top of the pedal, and it is usually attached to a bracket that keeps the switch in place.
The brake pedal switch also connects to a wiring harness that gives it power. Not all brake switches look the same; the way the switch looks differs slightly depending on the make and model of the vehicle. Some vehicles have more than one brake switch, and modern cars may have digital brake sensors installed instead of traditional brake switches.