Diagnosing and Replacing the Brake Light Switch on a 1990-1998 Ford F-350
This guide addresses common brake light, cruise control, and automatic transmission issues related to a faulty brake light switch on your OBS Ford F-350.
- A faulty brake light switch can cause brake lights to fail, stay on, or disable the cruise control.
- This part is not adjustable; if it's malfunctioning, it needs replacement.
- Correct installation order of the switch, bushings, and washers is critical for proper function.
- There is no recall for this specific part, but it is often confused with the recalled cruise control deactivation switch.
Is Your Brake Light Switch Failing?
A failing brake light switch on your 1990-1998 F-350 is more than just an inconvenience; it's a serious safety issue. This switch is a common failure point due to its simple mechanical design and constant use. Recognizing the symptoms early can prevent a ticket or a collision.
🎬 Watch: Learn more about the symptoms of a bad switch.Common Symptoms of a Bad Switch
- Brake Lights Don't Work: The most obvious sign is when your brake lights fail to illuminate when you press the pedal.
- Brake Lights Stay On: The switch can fail in the 'on' position, leaving your brake lights constantly lit and draining your battery.
- Delayed Brake Lights: You may have to press the brake pedal much harder or further than usual to get the lights to turn on.
- Cruise Control Problems: If the switch is faulty, it may not send the correct signal, preventing your cruise control from engaging or causing it to shut off unexpectedly.
- Automatic Transmission Issues: On automatic models, a bad switch can prevent the torque converter from locking up at highway speeds, resulting in higher engine RPMs and poor fuel economy.
Important Safety Note: No Adjustment
The brake light switch on this generation of F-350 is not adjustable. If it is not activating correctly, it is likely due to wear, damage, or incorrect installation, and the switch or its related components should be replaced.
Choosing the Right Aftermarket Part
For a straightforward part like this, the distinction between OEM and aftermarket is less about complex electronics and more about material quality and fit. The original Motorcraft switch is a reliable benchmark.
Aftermarket brands like Standard Ignition offer a direct replacement that meets or exceeds the original specifications. Given the simplicity of the switch, a quality aftermarket part from a reputable manufacturer is a perfectly acceptable and cost-effective choice. The most critical factor for a successful repair is not the brand, but the installation.
Pro Tip: Check the Bushings
While you're replacing the switch, inspect the nylon bushings and washers on the brake pedal pin. These small parts are crucial for proper switch alignment and operation. They are often worn, brittle, or missing entirely, which can cause even a new switch to function incorrectly.
🎬 See this tech tip for everything about the brake switch.Cost Breakdown for Brake Light Switch Replacement
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Motorcraft) | $25 - $50 |
| New Aftermarket (Standard Ignition) | $31.22 - $49.90 |
| Shop Labor | $75 - $150 |
Frequently Asked Questions (FAQ)
Is there a recall for the brake light switch on my 1990-1998 F-350?
No. While there was a widely publicized Ford recall for a cruise control deactivation switch that could cause fires, that is a different part located on the master cylinder under the hood. There are no specific recalls for the brake light switch located on the pedal for this year range.
Why do my brake lights stay on after replacing the switch?
This is almost always caused by incorrect installation. The switch must be installed in the correct order with its surrounding washers and bushings, and it must be oriented correctly on the pin. If the switch is installed backward or the bushings are missing, it can remain activated even when the pedal is released.
What is the correct installation order?
The assembly on the brake pedal pin should be in this specific order: first a nylon washer, then the plastic bushing, then the brake light switch itself (with the cutout side facing the pedal), followed by a second washer, and finally the retaining clip.
Can I do this replacement myself?
Yes, this is a very DIY-friendly job. The only challenge is the awkward position of working under the dashboard. No special tools are required beyond basic hand tools to remove the retaining clip. The job typically takes less than 30 minutes.
🎬 Watch: A step-by-step guide to replacing your brake light switch.Helpful Videos
Technical Specifications
OEM Part Numbers: E0TB13480AA E9AZ-13480-A SW-2237
A 2-terminal, 12-volt, push-on switch typically made with a metal body and mounted on the brake pedal arm.
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 F-350:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Brake Light Switch Failing?
- Common Symptoms of a Bad Switch
- Important Safety Note: No Adjustment
- Choosing the Right Aftermarket Part
- Pro Tip: Check the Bushings
- Cost Breakdown for Brake Light Switch Replacement
- Frequently Asked Questions (FAQ)
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