Is changing a brake switch easy?

Changing a brake switch is generally considered an easy job that can be done by most car owners with basic mechanical skills and tools. While it may seem daunting if you’ve never done it before, replacing a brake switch is a relatively simple repair that doesn’t require any specialized expertise.

What is a brake switch and what does it do?

The brake switch, also known as the brake light switch, is a sensor that detects when the brake pedal is pressed down. It is an important safety component that activates the brake lights so other drivers know when you are stopping. The switch is mounted on or near the brake pedal and is designed to close an electrical circuit when the pedal is depressed. This completes the circuit to the brake lights and illuminates them.

In addition to turning on the brake lights, the brake switch also performs other functions. On vehicles with automatic transmissions, it can prevent you from shifting out of park unless your foot is on the brake. It may also activate the cruise control disengagement switch when the brakes are applied.

Symptoms of a faulty brake switch

Some common signs that your brake switch may be malfunctioning include:

• Brake lights not coming on when the pedal is pressed
• Brake lights staying on all the time, even when pedal is not pressed
• Cruise control not disengaging when brakes are applied
• Inability to shift automatic transmission out of park without workarounds

If you notice any of these symptoms, it’s likely the brake switch needs to be replaced. Driving with a faulty brake switch can be unsafe, so it’s important to address the issue promptly.

When should the brake switch be replaced?

Here are some general guidelines for when to replace the brake switch:

• If the brake lights are not functioning properly
• If the switch appears damaged or faulty
• If you need to replace the brake pedal assembly
• When doing general brake system repairs or maintenance
• Approximately every 50,000-70,000 miles as preventive maintenance

The brake switch is not a very durable component and is designed to be replaced periodically. Switching it out as part of routine brake service will help avoid being caught off guard by a failure down the road.

Difficulty of replacing the brake switch

Replacing a brake light switch is usually considered an easy DIY job. On a difficulty scale of 1 to 10, with 10 being the most complex, it ranks about a 2 or 3 for most vehicles. There are a few reasons it is generally simple to change the switch:

• The location is easily accessible in the driver’s footwell
• It is external to major brake components so no need to disassemble anything
• There are no adjustments or programming required after installation
• The entire process usually takes less than 30 minutes

Additionally, the part itself is very inexpensive, usually costing less than $20. The only tools required are basic hand tools like a wrench or socket set. No bleed procedures or other complicated steps are necessary in most cases.

Step-by-step instructions

While the exact steps can vary slightly depending on your vehicle’s make and model, here is a general overview of the brake light switch replacement process:

1. Locate the existing brake switch near the top or side of the brake pedal arm. It will have an electrical connector plugged into it.
2. Disconnect the electrical connector by hand or using pliers. Pushing down on a retaining tab may make it easier to detach.
3. Hold the switch steady with a wrench and loosen the mounting nut. Some vehicles use a threaded stud instead of a nut.
4. Remove the switch from the brake pedal assembly. Note the old orientation.
5. Compare the old switch to the new replacement part. Make sure they match.
6. Install the new switch in the same orientation and finger tighten the mounting nut/stud.
7. Plug in the electrical connector until it clicks into place.
8. Test operation by pressing the brake pedal and checking that the brake lights illuminate.

It’s always smart practice to consult your vehicle repair manual for the proper procedure. But in general, those are the basic steps involved. Taking proper safety precautions and working carefully, the job can be completed with relative ease by most do-it-yourselfers.

Helpful tips and precautions

Here are some helpful tips and precautions to keep in mind:

• Purchase the correct replacement part for your vehicle’s make and model.
• Disconnect the battery before starting work to avoid an accidental short.
• Protect painted surfaces from scratches when removing the old switch.
• Do not force electrical connectors – they are usually designed for easy connect and disconnect.
• Make sure the new switch clicks securely into the mounting bracket.
• Double check that the electrical connector is fully seated after installation.
• Press the brake pedal firmly to test switch operation before driving.

Taking the time to do the job carefully and methodically will help ensure many more years of reliable service from the new brake switch.

Cost comparison of DIY vs professional replacement

Doing the brake switch replacement yourself can save a considerable amount of money compared to having it done by a professional mechanic. Here is a cost comparison:

Replacement method	Parts cost	Labor cost	Total cost
DIY	$15	$0	$15
Professional repair shop	$15	$120	$135

As you can see, doing it yourself costs only about $15 for the part. Having a shop do it will run over $100 after accounting for an hour or more of labor. So you can save roughly $120 by taking care of this simple repair on your own.

Factors that could increase garage repair cost

Here are some things that could drive the garage price up even higher:

• Diagnostic fees to initially inspect and test the brake switch system
• Different labor rates at different shops
• Additional repairs identified and recommended during brake service
• “Shop fees” or miscellaneous charges added to the invoice

Your actual savings may be over $150 in some cases. And you avoid the hassle of taking your vehicle to the shop and coordinating pickup/dropoff.

Conclusion

Replacing a faulty brake light switch is considered an easy DIY repair on most vehicles. All that is required is disconnecting an electrical plug, removing one nut/stud, transferring the switch to the new part, and reconnecting. With minimal cost for parts and tools, it can be performed in less than 30 minutes by someone with basic mechanical skills.

Skipping this repair may lead to dangerous driving conditions and potential legal issues if the brake lights are not working properly. But there is no reason to pay a professional excessive labor fees for such a straightforward job. Follow the proper precautions and steps outlined above, and you can safely change the switch yourself, saving a good chunk of money in the process.