Your Guide to the 1975-1980 Mercury Bobcat Brake Light Switch
Understanding, diagnosing, and replacing this critical safety component on your classic Bobcat.
- A faulty brake light switch is a critical safety issue that must be fixed immediately.
- Symptoms are simple: lights don't work, lights stay on, or they are intermittent.
- Replacement is a very easy DIY job, taking less than 30 minutes with basic tools.
- Quality aftermarket brands like Standard Ignition and Rostra are the go-to choice for this repair.
Symptoms of a Failing Brake Light Switch
A bad brake light switch on a Mercury Bobcat has very clear symptoms. Because the part is a simple mechanical switch, failures are usually obvious. Before replacing the switch, always check your brake light bulbs and the fuse first—it can save you time and money.
- Brake Lights Do Not Turn On: This is the most dangerous symptom. The internal contacts of the switch can wear out, preventing the circuit from completing when you press the pedal. This means drivers behind you won't know you are stopping.
- Brake Lights Stay On: The switch can also fail in the "on" position. This can happen if the plunger gets stuck or an internal spring breaks. This will confuse other drivers and will drain your car's battery when parked.
- Intermittent Brake Lights: If the lights flicker or only work some of the time, the switch's internal components are likely worn and making a poor connection.
Choosing the Right Aftermarket Part
For a vehicle like the 1975-1980 Mercury Bobcat, finding a new old stock (NOS) OEM Ford part is nearly impossible. The good news is that the aftermarket provides reliable and affordable replacements. For a simple part like this, a quality aftermarket switch will perform just as well as the original.
The two main brands you will find are:
- Standard Ignition (Standard Motor Products): Often considered a top-tier aftermarket brand, especially for electrical components on classic American cars. They have a long-standing reputation for quality and durability.
- Rostra Powertrain: A well-known supplier of aftermarket and OE-style components, including various types of vehicle switches. They offer a solid, reliable option for this repair.
Pro-Tip: Given the simplicity of this part, both Standard Ignition and Rostra are excellent choices. The most important factor is ensuring the part is listed as compatible with your 1975-1980 Bobcat. The part is also shared with the Ford Pinto of the same years.
Estimated Cost Comparison
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $17.67 - $31.82 |
| Shop Labor | $50 - $100 |
| New OEM | Not Available |
| Used OEM | Not Recommended |
Prices are estimates and may vary based on retailer and location. Labor costs are based on an estimated 0.5 hours of work at a typical shop rate.
Known Issues, Recalls, or TSBs
No recalls or technical service bulletins (TSBs) specifically related to the brake light switch were found for the 1975-1980 Mercury Bobcat. The major historical recalls for this vehicle platform were related to the fuel tank system and did not involve the brake light switch. Any failure of this part is typically due to the normal wear and tear of a 40+ year-old component.
Frequently Asked Questions
Can I replace the brake light switch myself?
Yes, absolutely. This is a very easy DIY job that most owners can do. The switch is located above the brake pedal, is easy to access, and typically requires no special tools. The entire job usually takes less than 30 minutes.
Where is the brake light switch located?
Look up under the dashboard, directly above the brake pedal arm. You will see a small switch with a wiring connector, mounted on a bracket. It is designed to make contact with the pedal arm when it is at rest.
What tools do I need for the job?
Typically, you only need basic hand tools. A flashlight will be helpful to see under the dash. The switch is usually threaded into its bracket and held with a nut, or it may have a clip. You may need a small wrench or pliers. Before you start, it's a good idea to disconnect the negative terminal on your car's battery.
Is the brake light switch the same as the neutral safety switch?
No. The brake light switch is located on the brake pedal and controls the brake lights. The neutral safety switch is part of the shifting mechanism and ensures the car only starts in Park or Neutral. They are completely different parts with different functions.
Technical Specifications
OEM Part Numbers: D1ZB13480A D1ZB13480B D1ZZ13480B E27B13480AA E3TZ13480C E6TZ13480A SLS82
The switch is a direct-fit mechanical switch with a 2-blade male electrical connector.
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.