Diagnosing and Replacing the Brake Light Switch on a 2015-2019 Lincoln MKC
If your brake lights, cruise control, or gear shifter are acting up, the problem might be a small, easy-to-replace switch.
- A faulty brake light switch can cause brake light failure, prevent shifting from Park, and disable cruise control.
- Before buying a new switch, check for a broken plastic stopper on the brake pedal arm, which is a common and cheaper fix.
- Replacement is a simple DIY task, typically taking less than 30 minutes with no special tools required.
- Ensure your vehicle has had the unrelated but critical NHTSA recall (23V-378) for fire risk completed by a dealer.
Is Your Lincoln MKC Exhibiting Strange Electrical Issues?
A faulty brake light switch is a common issue that can cause confusing symptoms in your 2015-2019 Lincoln MKC. Because this switch communicates with multiple vehicle systems, its failure can mimic other, more serious problems. Before suspecting major transmission or computer issues, it's wise to check this simple and inexpensive component. Common signs of failure include brake lights that won't turn on or are stuck on, the inability to shift out of Park, and cruise control that refuses to activate.
Important Safety Recall Notice
While not related to the brake light switch, all 2015-2019 Lincoln MKC models were recalled under NHTSA campaign 23V-378 for a fire risk from the battery monitor sensor. This can cause an engine compartment fire, even when the vehicle is parked and off. Ensure this recall repair has been performed on your vehicle by a Lincoln dealer.
Symptoms of a Failing Brake Light Switch
If the brake light switch is failing, you may experience one or more of the following issues:
- Brake Lights Don't Work: The most obvious and dangerous symptom. The switch has failed to complete the circuit. 🎬 See why your brake lights might not be working.
- Brake Lights Stay On: The switch is stuck in the 'on' position, which can drain your battery. This can also be caused by a broken or missing plastic stopper on the brake pedal arm.
- Cannot Shift Out of Park: The shift interlock solenoid does not receive the signal that the brake is applied, so it won't release the gear selector. 🎬 Watch this video if you're stuck in Park.
- Cruise Control Won't Set: The system sees a constant or faulty brake signal and will not allow the cruise control to engage.
- Car Won't Start: For the push-button start to work, the system must detect that the brake pedal is depressed. A bad switch can prevent this signal from being received.
Choosing the Right Aftermarket Brake Light Switch
For a simple electronic switch like this, a quality aftermarket part is a reliable and cost-effective alternative to the OEM part. The key is choosing a brand with a good reputation for quality control.
- Tier 1 (Established Brands): Standard Ignition (SMP) and Dorman are well-known manufacturers with a long history of producing reliable aftermarket components. They are often considered trusted alternatives to OEM.
- Tier 2 (Reliable Alternatives): Brands like Holstein, Rostra Powertrain, True Tech, and VNE offer quality parts that meet or exceed OEM specifications. They provide excellent value and are a dependable choice for this repair.
- Tier 3 (Value-Oriented): The Replacement brand offers a direct-fit part at the most budget-friendly price point, making it a practical option for a straightforward repair.
Pro Tip: Before ordering a new switch, get under the dashboard and look at the brake pedal arm. Sometimes, a small plastic or rubber stopper that presses the switch's plunger breaks or falls out. If the stopper is missing, the switch will think the brake is always pressed. This is a much cheaper and simpler fix than replacing the entire switch.
Cost of Replacing the Brake Light Switch
| Part Type | Estimated Cost |
|---|---|
| New OEM (Motorcraft) | $35 - $58 |
| New Aftermarket | $23 - $36 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions
Can I drive my MKC with a bad brake light switch?
It is not recommended. If your brake lights are not working, it is a major safety hazard. If they are stuck on, your battery will drain. If you are unable to shift out of park, the vehicle is undrivable. This repair should be made immediately.
Is replacing the brake light switch a DIY job?
Yes, for most people with basic tools. The switch is located above the brake pedal and is usually held in place by a clip or a twist-lock mechanism. It requires working in a tight space under the dashboard, but no special tools are needed. The entire process typically takes less than 30 minutes.
🎬 Watch a step-by-step guide on replacing the switch.Do I need to disconnect the battery to replace the switch?
While the system is low voltage, it is always a best practice to disconnect the negative battery terminal before working on any electrical components. This prevents any risk of short circuits.
What if I replace the switch and the problem isn't fixed?
First, check the fuse for the brake lights in your vehicle's fuse box. Also, inspect the wiring and connector for any visible damage. As mentioned in the Pro Tip above, ensure the plastic stopper on the brake pedal arm is intact, as its absence will cause the new switch to behave just like the old one.
Helpful Videos
Technical Specifications
OEM Part Numbers: GL3Z-13480-A 8T4Z-13480-A 7T4Z-13480-AA
4-pin connector, twist-lock mounting style.
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.
- Lincoln MKC: