Studebaker 4E7D Brake Light Switch Replacement Guide (1959)
Keep your classic 1959 Studebaker 4E7D safe and on the road by ensuring its brake lights function correctly.
- The 1959 Studebaker 4E7D uses a hydraulic pressure switch, not a mechanical one at the pedal.
- Failure is a critical safety issue; the most common symptom is the complete failure of brake lights.
- A new aftermarket switch from a brand like Standard Ignition is the most practical and reliable replacement option.
- Replacement is a simple DIY job, but you must bleed the brakes afterward to ensure safety.
Is Your Studebaker's Brake Light Switch Failing?
A faulty brake light switch on a classic truck like the 1959 4E7D is a serious safety issue. You won't get a warning light on your dashboard; the first sign of a problem is often when the lights fail to work. The symptoms are usually straightforward and easy to spot.
Key Failure Symptoms
- Brake Lights Don't Turn On: This is the most common and dangerous symptom. The switch has failed and no longer completes the electrical circuit when you press the brake pedal.
- Brake Lights Stay On: If the switch fails in the 'on' position, it can drain your battery and confuse other drivers.
- Delayed or Intermittent Lights: A failing hydraulic switch might require more brake fluid pressure to activate. This means your lights may only come on during hard braking, or not at all during gentle stops.
Check Bulbs and Fuses First
Before you decide the switch is bad, always check the simple things. Make sure your brake light bulbs haven't burned out and that the fuse for the circuit is good. Also, inspect the wiring to the switch for any loose connections or obvious damage.
Choosing the Right Aftermarket Switch
For a 1959 vehicle, finding original equipment (OEM) parts from Studebaker is nearly impossible. Your options are typically New Old Stock (NOS), used original parts, or new aftermarket parts.
- New Old Stock (NOS): These are original, unsold parts. They are very rare, expensive, and may have degraded over decades of storage. They are primarily for collectors seeking 100% originality.
- Used OEM: These are pulled from salvage vehicles. Availability and condition can vary widely.
- New Aftermarket: This is the most practical and common choice. For a simple component like a brake light switch, a new aftermarket part from a reputable brand is often more reliable than a 60-year-old original.
Brand Spotlight: Standard Ignition
Standard Ignition (also sold as SMP) is a well-known and trusted brand in the aftermarket industry, producing parts for over 100 years. They are a common source for reliable replacement components for classic vehicles. For a part like the brake light switch, Standard Ignition provides a dependable and affordable solution to get your brake lights working properly again.
A Note on Upgrades
Some classic Studebaker owners, frustrated with the reliability of hydraulic switches, convert to a modern mechanical switch mounted by the brake pedal. This is a more involved project but eliminates the hydraulic switch and its potential for leaks or failure, especially when using modern silicone brake fluid. However, for a direct and simple replacement, a new aftermarket hydraulic switch is the easiest option.
Typical Replacement Costs
Replacing the brake light switch on a 1959 Studebaker 4E7D is an inexpensive repair, especially if you do it yourself.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard Ignition) | $15 - $20 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions
Where is the brake light switch located on my 1959 Studebaker 4E7D?
The brake light switch is typically not inside the cab. It is a hydraulic pressure switch screwed into the master cylinder or a brake line junction block, usually found under the hood or on the frame rail. It will have two wires connected to it.
Is replacing the brake light switch a difficult DIY job?
No, for most DIY mechanics, this is a straightforward job. It involves disconnecting the wires, unscrewing the old switch, and screwing in the new one. However, because it is part of the hydraulic brake system, you will need to bleed the brakes afterward to remove any air that entered the lines. If you are not comfortable bleeding brakes, it is best to have a professional do the job.
Are there any recalls for the brake light switch on my truck?
No, searches of the National Highway Traffic Safety Administration (NHTSA) database show no open or past recalls for the 1959 Studebaker 4E7D regarding the brake light switch. Recalls for vehicles of this age are very rare.
Can I use modern silicone brake fluid with a new switch?
You must check compatibility. Some reproduction hydraulic switches are known to fail when used with DOT 5 silicone brake fluid. It's often recommended to use DOT 3 fluid, which was original to the vehicle, unless the part manufacturer specifies otherwise.
Technical Specifications
Hydraulic pressure-activated, 2-terminal switch. Threaded for installation into the brake system's master cylinder or junction block.
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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.