1997-2001 Ford Expedition Brake Light Switch Guide
If your Expedition won't shift out of park or the brake lights are acting up, your brake light switch is a likely suspect.
- A faulty brake light switch is a primary cause for being unable to shift a 1997-2001 Expedition out of Park.
- Symptoms include non-working brake lights, brake lights that stay on, and cruise control failure.
- Replacement is a simple DIY task, typically taking less than 15 minutes with no special tools.
- Before replacing the switch, check the related fuses and inspect the wiring harness for breaks near the connector.
Is Your Expedition Stuck in Park?
A common and frustrating problem for 1997-2001 Ford Expedition owners is the inability to shift the gear selector out of Park. Often, the cause is a failed brake light switch. This switch, also called a stop light switch, is part of a safety system called the brake-shift interlock. The system requires the brake pedal to be pressed before the shifter will move. When the switch fails, the vehicle's computer doesn't get the signal that the brake is applied, and it keeps the shifter locked in Park.
Safety Recall Notice
There was a significant safety recall (NHTSA Campaign ID: 05V388000, Ford Recall 05S28) for 1997-2002 Expeditions related to a different switch: the speed control deactivation switch, located on the brake master cylinder. This switch could leak brake fluid, overheat, and potentially cause an under-hood fire, even with the vehicle turned off. While this is a separate part from the brake light switch located on the pedal, it is critical to ensure this recall work has been performed on your vehicle. You can check your VIN on the NHTSA website.
Symptoms of a Failing Brake Light Switch
- Cannot Shift Out of Park: This is the most common and disruptive symptom.
- Brake Lights Don't Work: When you press the pedal, the brake lights do not illuminate. This is a serious safety hazard.
- Brake Lights Stay On: The switch can also fail in the 'on' position, leaving your brake lights constantly lit and draining your battery.
- Cruise Control Inoperative: The cruise control system relies on the brake light switch to disengage. If the switch is faulty, the cruise control may not set or may turn off unexpectedly.
- ABS Light On: A faulty switch can sometimes trigger the ABS warning light on the dashboard.
Choosing the Right Aftermarket Switch
When replacing the brake light switch, you have several options. The quality can vary, so it's important to choose wisely. The installation is simple, so investing in a better part upfront can save you from doing the job twice.
Brand Quality Tiers
- Tier 1 (OEM Equivalent): Motorcraft is Ford's original equipment brand. Choosing a Motorcraft switch (like part number SW5985) ensures a perfect fit and the same durability as the factory part. This is the safest bet for reliability.
- Tier 2 (High-Quality Aftermarket): Standard Ignition (SMP) is a well-respected aftermarket manufacturer known for producing quality components that often meet or exceed OE specifications. They are a reliable alternative to Motorcraft.
- Tier 3 (Standard Aftermarket): Brands like Rostra Powertrain and Vemo offer more budget-friendly options. Rostra produces a wide range of electronic components and their switches are generally considered direct-fit replacements. Vemo is another option, though user reviews can be mixed and often based on price. For a critical component like a brake light switch, sticking to Tier 1 or 2 is often recommended for peace of mind.
Pro Tip: Before replacing the switch, always check the fuse first! A blown fuse can cause similar symptoms. Also, inspect the wiring and connector at the switch, as wires can sometimes break near the connector, especially on older vehicles.
Estimated Costs
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $20.79 - $55.93 |
| New OEM (Motorcraft) | $35 - $60 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions
Can I replace the brake light switch myself?
Yes, this is a very DIY-friendly repair. The switch is located on the brake pedal support bracket under the dashboard. It typically requires no special tools—just disconnecting the electrical plug and twisting the switch to remove it. The entire job usually takes less than 15 minutes.
Where is the brake light switch located on a 1997-2001 Expedition?
It is mounted to the brake pedal assembly, high up under the driver's side dashboard. You will need to look up from the floor to see it attached to the bracket where the pedal pivots.
Why won't my cruise control work?
The cruise control system needs to know when you're braking to turn off. It gets this signal from the brake light switch. If the switch is faulty and sending a constant 'brake on' signal (even if the lights aren't on), the cruise control will not engage.
My brake lights work, but I still can't shift out of park. What else could it be?
While the brake light switch is the most common cause, the issue could also be a blown fuse for the shift interlock system, a faulty shift interlock solenoid in the steering column or center console, or broken wiring. On these Expeditions, water leaks from the windshield can sometimes damage the fuse box, causing various electrical issues, including being stuck in park.
Technical Specifications
OEM Part Numbers: F87Z-13480-AA 2L1Z-13480-AA SW5985 SW-2237
Located on the brake pedal support bracket. Typically a 4-pin connector. Operates brake lights, shift interlock, and cruise control disconnect.
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.
- Ford Expedition: