1971-1973 Buick Centurion Brake Light Switch: A Comprehensive Guide
Don't get left in the dark; a faulty brake light switch is a critical safety failure you can fix yourself.
- A bad brake light switch is a critical safety issue; do not drive if your brake lights are not working.
- Symptoms are straightforward: lights won't turn on, stay on, or work intermittently.
- Replacement is a very simple DIY task that can be completed in under 15 minutes with no special tools.
- Quality aftermarket brands like Standard Ignition are a reliable choice for this part.
Is Your Centurion's Brake Light Switch Failing?
After more than 50 years of service, the original brake light switch in your classic Buick has seen a lot of action. The internal contacts can wear out and the plastic housing can become brittle. The symptoms of a failing switch are usually straightforward and should be addressed immediately for safety reasons. A switch that doesn't work creates a serious risk of a rear-end collision, while one that's stuck on can drain your battery and confuse other drivers.
Critical Safety Warning
It is illegal and extremely unsafe to drive a vehicle with non-functioning brake lights. If you suspect your brake light switch has failed and your lights are not working, do not drive the car until it is repaired.
Top 3 Failure Symptoms
- Brake Lights Do Not Turn On: This is the most dangerous symptom. If you've already checked that the bulbs and fuses are good, the brake light switch is the most likely cause.
- Brake Lights Stay On Permanently: If the switch fails in the 'on' position or gets stuck, it will cause the brake lights to remain lit even when you are not braking. This will drain your battery and can lead to other drivers not recognizing when you are actually slowing down.
- Intermittent Brake Lights: The lights may flicker or only work when you press the pedal with a specific amount of force. This usually points to worn or dirty internal contacts within the switch.
Choosing the Right Aftermarket Switch
For a vehicle of this age, finding a new original equipment (OEM) part from GM is highly unlikely. The market consists almost entirely of aftermarket replacements, which are readily available and affordable. For a simple component like a brake light switch, a quality aftermarket part is more than sufficient and often built to modern standards that meet or exceed the original 1970s specifications.
| Brand Tier | Brands | General Quality & Price |
|---|---|---|
| Standard Replacement | Standard Ignition (SMP), AC Delco | Standard Ignition is a well-regarded brand in the aftermarket community, known for reliable electronic components that fit and function correctly. AC Delco is also a trusted name with a long history of supplying parts for GM vehicles. These are excellent choices for a stock restoration. |
| Economy | Skyward, Duralast, Wells, various store brands | These brands offer a cost-effective solution that gets the job done. For a simple switch like this, an economy brand is a viable option if budget is the primary concern, and they typically come with a limited warranty. |
Mechanic's Tip
When replacing the switch, take a moment to inspect the small metal retainer clip that holds it to the pedal bracket. After 50+ years, these clips can become brittle and break upon removal. It's wise to have a new clip on hand, as a loose switch will not function correctly.
Frequently Asked Questions (FAQ)
Where is the brake light switch located on my Centurion?
The brake light switch is found under the driver's side dashboard. Look up at the top of the brake pedal arm, where it pivots on the support bracket. You will see the switch mounted there, with its plunger touching the pedal arm.
Can I replace the brake light switch myself?
Yes, absolutely. This is one of the easiest repairs you can perform. It typically requires no special tools, though a pair of pliers can be helpful for the retainer clip. The process involves unplugging the electrical connector, removing the clip, and pulling the old switch out. Installation is simply the reverse of removal. The entire job can usually be done in under 15 minutes.
Are there any recalls for the 1971-1973 Centurion brake light switch?
No. A search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls or safety campaigns specifically related to the brake light switch for the 1971-1973 Buick Centurion.
My new switch is in, but the brake lights still don't work. What's next?
First, double-check the simple things: the fuse and the bulbs. If those are confirmed to be good, the next place to look is the turn signal switch in the steering column. On many classic GM cars, the brake light power runs through the turn signal switch, and a fault in that switch can prevent the brake lights from working.
Technical Specifications
OEM Part Numbers: 358560C1
Mechanical plunger-style switch with two terminals, activated by brake pedal arm movement. Typically for vehicles without cruise control.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.