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Where Is the Brake Light Switch Located?

Reviewed by

Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on November 2nd, 2023

Reading Time: 3 minutes

Contents hide

1. Q: Where Is the Brake Light Switch Typically Located?

2. Tips on How to Access the Brake Light Switch

Q: Where Is the Brake Light Switch Typically Located?

A: In most vehicles, the brake light switch can be found under the dashboard, sitting on top of the brake pedal.

A brake light switch can also be referred to as a stop lamp switch, brake pedal position switch, or brake on/off switch (for Ford models). It turns on the brake lights at the vehicle’s back when braking.

The light switch automatically activates the brake lights as soon as the driver steps on the brakes and before the braking action starts at the wheels. Brake light switches are normally open. Stepping on the brake pedal closes the switch and completes the circuit.

Brake light switches on most newer vehicles also serve as an input to the body computer for various functions, including the anti-lock brake system and electronic stability control system input signals.

diagram of a 2006 impala brake lamp — Notice the role the BCM plays in activating the stop lamps when the switch is triggered on this 2006 Impala and how the BCM also gives stop lamp switch information to the TCM and ECM. Another BCM input not shown here is the turn/hazard lamp switch. | Image Source: Richard McCuistian

circuit diagram of a 1985 impala brake lamp — The Illustration shown here is the stop lamp circuit on a 1985 Impala. The circuit passes through the turn signal switch on vehicles that use the same lamp for stop and turn. The stop lamp (brake lamp) switch is always mounted so that the brake pedal operates the switch. | Image Source: Richard McCuistian

Tips on How to Access the Brake Light Switch

In most cases, you won’t even get your hands dirty while trying to access the brake light switch. All you have to do is get under the dashboard, and you’ll find the brake light switch on the brake pedal lever or a nearby mounting bracket.

Depending on its assembly, you’ll need to unclip the switch or unbolt it from the mounting bracket.

Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.

Pro Tip: Some stop lamp switches require adjustment after they’re replaced, some don’t. But the stop lamp switch is a normally closed switch that is held open when the brake pedal is in the released position.

About The Authors

Written By

CarParts.com Research Team

Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By

Richard McCuistian

Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.