Ford F-150 (2009-2017) Brake Light Switch: Symptoms and Replacement Guide
If your F-150 won't shift out of park or the brake lights are acting up, the brake light switch is the likely culprit.
- If your F-150 is stuck in Park, the brake light switch is the most likely cause, not the transmission.
- Symptoms include brake lights staying on (draining the battery), not working at all, or cruise control failure.
- This is a very easy and low-cost DIY repair that usually takes less than 15 minutes with minimal tools.
- A recall was issued for 2009 models for improper switch adjustment, so ensure your new switch is seated correctly.
Is Your F-150's Brake Light Switch Failing?
A bad brake light switch can make you think your truck has a major transmission or electrical problem. Luckily, it's usually an easy and inexpensive fix. Before you suspect a bigger issue, check for these common symptoms.
Top 5 Failure Symptoms
- Stuck in Park: This is the most common complaint. The switch fails to tell the truck's computer that your foot is on the brake, so the safety interlock won't release the shifter.
- Brake Lights Don't Work: The switch fails to complete the circuit, and your brake lights won't turn on at all. This is a serious safety hazard.
- Brake Lights Stay On: The switch can get stuck in the 'on' position, leaving your brake lights on even when the truck is off. This will drain your battery in a matter of hours.
- Cruise Control Won't Engage: If the switch is faulty, it may prevent the cruise control from setting or cause it to turn off unexpectedly.
- ABS or Traction Control Warning Lights: These systems rely on data from the brake light switch, and a bad signal can trigger a warning light on your dash.
Recall Notice for 2009 & 2014 Models
Ford issued a recall (NHTSA Campaign ID: 09V150000) for about 8,700 model year 2009 F-150s due to an improperly adjusted brake light switch from the factory. This could cause a delay or complete failure of the brake lights. A similar, smaller recall was issued for some 2014 models. While the recall period is over, it highlights the importance of making sure the switch is installed and seated correctly.
Choosing the Right Aftermarket Brake Light Switch
For a simple part like a brake light switch, you don't always need to pay dealer prices. Aftermarket brands offer a reliable and affordable alternative. Here’s a breakdown of the brands available.
- Premium Aftermarket (Standard Ignition, Dorman): These are well-known brands that specialize in producing parts that meet or exceed original equipment (OE) specifications. They are a trusted choice for both professional mechanics and DIYers.
- Standard Aftermarket (Holstein, Rostra Powertrain): These brands provide a good balance of quality and value. They are a solid choice for a daily-driven F-150.
- Value-Priced (Replacement, True Tech): These brands offer the most budget-friendly options. While generally reliable for a common part like this, one owner on a forum did report receiving a faulty aftermarket switch, so it's important to test the part immediately after installation.
Pro Tip: After installing your new switch, have a friend stand behind the truck to confirm the brake lights work instantly when you press the pedal and turn off completely when you release it. Also, make sure you can shift out of Park smoothly. This quick check ensures the new part is working correctly.
How Much Does a Replacement Cost?
Replacing the brake light switch is one of the cheaper repairs you can make on your F-150. The part itself is inexpensive, and if you do it yourself, you can save significantly on labor.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Switch | $23.47 - $41.30 |
| New OEM (Ford) Switch | $35 - $70 |
| Shop Labor Cost | $49 - $72 |
| Total (DIY Aftermarket) | $23.47 - $41.30 |
| Total (Shop-Installed Aftermarket) | $72 - $114 |
Frequently Asked Questions
Where is the brake light switch located on a 2009-2017 F-150?
The brake light switch is mounted directly to the brake pedal assembly, high up under the driver's side dashboard. You will need to look up from the floor mat to see it attached to the metal arm of the brake pedal.
Is it hard to replace the brake light switch myself?
No, this is a very easy DIY job. For most 2009-2017 F-150s, the replacement takes 5-10 minutes and requires few or no tools. You typically unplug the wire connector, twist the old switch to remove it, and then install the new one in the reverse order.
My truck is stuck in Park. How can I move it before I replace the switch?
There is a manual shift lock release. For trucks with a center console shifter, you can often pry up the trim around the shifter to access a small slot or button. Pressing down on the release mechanism inside this slot with a screwdriver will allow you to move the shifter. For column shifters, the process may involve removing the steering column shroud to access the release solenoid. This allows you to move the truck to a safe place for repair.
Why do my brake lights stay on and drain my battery?
This happens when the internal contacts of the brake light switch fail and get stuck in the closed (on) position. This creates a constant electrical circuit, keeping the lights on and draining the battery, often overnight. Replacing the switch is the correct fix.
Helpful Videos
Technical Specifications
OEM Part Numbers: GL3Z-13480-A BL3Z-13480-A 8T4Z-13480-A
Located on the brake pedal arm. Typically a 4-pin electrical connector. Functions as a stop lamp switch, cruise control deactivation switch, and shift interlock signal.
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.
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