1958 Studebaker 3E10 Brake Light Switch: Replacement and Diagnosis
Keep your classic Studebaker safe and road-legal by ensuring its brake lights function correctly.
- The 1958 Studebaker 3E10 uses a hydraulic brake light switch located on the master cylinder, not a mechanical one at the pedal.
- Failure is a critical safety issue; do not drive the vehicle if the brake lights are not working.
- A new aftermarket switch from a brand like Standard Ignition is the most reliable and cost-effective replacement option.
- Replacement is a simple DIY task, but you must bleed the brakes afterward to ensure safety.
Diagnosing a Faulty Brake Light Switch
On a straightforward truck like the 1958 3E10, diagnosing a bad brake light switch is usually simple. The symptoms are clear and point directly to a problem in the brake light circuit. Before you replace the switch, always perform these two simple checks first:
- Check the Bulbs: Make sure both rear brake light bulbs are not burned out.
- Check the Fuse: Inspect the fuse for the brake light circuit to ensure it is not blown.
If the bulbs and fuse are good, the switch itself is the most likely culprit. The most common signs of failure are brake lights that don't work at all or brake lights that stay on constantly.
Choosing the Right Aftermarket Switch
For a vehicle from the 1950s, finding a new original equipment (OEM) part from Studebaker is no longer possible. Your options are typically New Old Stock (NOS), used original parts, or new aftermarket parts. For a simple and critical component like a brake light switch, a new aftermarket part is the most practical and reliable choice. Modern manufacturing standards often result in a more durable part than what was available decades ago.
Brand Spotlight: Standard Ignition
Standard Ignition is a well-established brand that produces reliable replacement parts for a huge range of vehicles, including classics like the Studebaker 3E10. Their switches are designed to meet or exceed original specifications and are made from high-quality materials like copper alloy conductors and durable housings for long service life. For this application, the Standard Ignition switch is a direct-fit replacement, making installation simple.
Cost of Replacing a Brake Light Switch
Replacing the brake light switch is one of the most affordable repairs you can perform on your truck. The part itself is inexpensive, and the labor is minimal.
| Part Type | Price Range |
|---|---|
| New Aftermarket (Standard Ignition) | $15.52 - $15.52 |
| New OEM | Not Available |
| Used OEM | Varies, not recommended |
| Shop Labor | $50 - $100 |
A Note on Brake Fluid
Some reproduction hydraulic switches are not compatible with modern DOT 5 silicone brake fluid. Using the wrong fluid can cause a new switch to fail quickly. The Standard Ignition replacement is designed for use with standard DOT 3 brake fluid, which was original to the vehicle. Always confirm compatibility before installation.
Frequently Asked Questions (FAQ)
Where is the brake light switch located on my 1958 Studebaker 3E10?
The brake light switch is a hydraulic pressure switch located under the hood. It is screwed directly into the brake master cylinder and will have two wires connected to it.
Is it difficult to replace the brake light switch myself?
No, this is a very easy job for a DIY mechanic. It involves disconnecting the two wires, unscrewing the old switch, and quickly screwing in the new one. However, it is critical that you bleed the brakes after replacement to remove any air that may have entered the system.
How do I test the brake light switch?
After confirming the bulbs and fuse are good, locate the switch on the master cylinder. Unplug the two wires and use a small jumper wire to carefully touch the two wire terminals together. If the brake lights turn on, the switch is faulty and needs to be replaced. If they do not light up, the problem is elsewhere in the wiring.
Are there any recalls for this part?
No, there are no recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) for the brake light switch on a 1958 Studebaker truck. This is normal for a vehicle of this vintage.
Technical Specifications
OEM Part Numbers: 666858
Hydraulic Pressure Activated, 2-Terminal, Screw-in type for Master Cylinder mount.
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.