1960 Studebaker 5E7D Brake Light Switch Replacement and Diagnosis
Everything you need to know about the hydraulic brake light switch in your classic Studebaker truck.
- The 1960 5E7D uses a hydraulic pressure switch, not a mechanical one, which requires bleeding the brakes after replacement.
- A faulty brake light switch is a critical safety hazard; do not drive the vehicle if the brake lights are not working correctly.
- Standard Ignition offers a reliable and affordable aftermarket replacement switch.
- Be aware that modern silicone brake fluid (DOT 5) may cause premature failure in some reproduction hydraulic switches.
Understanding Your Studebaker's Hydraulic Brake Light Switch
The 1960 Studebaker 5E7D truck uses a type of brake light switch that was common for its era but is very different from modern designs. It is a pressure-activated switch that lives in the brake's hydraulic circuit. This means that when you replace it, you are opening the brake system and will need to bleed the brakes afterward to remove any air that gets into the lines. This is a crucial safety step.
These original-style hydraulic switches are known for having reliability issues compared to modern mechanical switches. Failures are common, but thankfully, the part is simple and inexpensive to replace.
Symptoms of a Failing Brake Light Switch
When this switch starts to fail, the signs are usually clear. Always check your bulbs and fuses first, but if they are good, the switch is the most likely cause.
- No Brake Lights: The most dangerous symptom is when the brake lights do not come on at all. This means the switch has failed completely.
- Brake Lights Stuck On: The switch can also fail in the 'on' position, which will keep your brake lights illuminated constantly, draining your battery and confusing other drivers.
- Lights Only Work With Hard Braking: A worn-out switch may require very high fluid pressure to activate. This means your lights might not turn on during gentle stops, which is a significant safety risk.
A Note on Brake Fluid
Many classic car owners switch to modern DOT 5 silicone brake fluid. Be aware that some reproduction hydraulic switches are not compatible with silicone fluid and may fail prematurely. If you use DOT 5 fluid, you may want to consider converting to a mechanical switch for better long-term reliability.
Choosing the Right Aftermarket Part
For a vehicle of this age, New Old Stock (NOS) OEM parts are extremely rare and often expensive. The standard for replacement is a quality new aftermarket part. Standard Ignition is a well-known brand that produces a compatible hydraulic switch for your Studebaker. Reviews for their switches are generally positive, making them a reliable and affordable choice for getting your brake lights working correctly again.
Pro Tip: Consider a Mechanical Switch Upgrade
For a more permanent and reliable solution, many Studebaker owners modify their trucks to use a modern mechanical brake light switch. This involves fabricating a small bracket to mount the switch near the brake pedal arm. This upgrade eliminates the common failure points of the hydraulic switch and removes a potential leak point from your brake system.
Estimated Costs for Brake Light Switch Replacement
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard Ignition) | $15.52 |
| Shop Labor (including brake bleed) | $100 - $180 |
| New Old Stock (NOS) OEM | Very rare, likely $50+ if found |
Frequently Asked Questions
Where is the brake light switch located on my 1960 Studebaker truck?
The switch is not inside the cab by the pedal. You will find it screwed into the master cylinder or a brake line junction block, typically on the frame rail in the engine bay. It will have two electrical wires connected to it.
Is replacing the brake light switch a DIY job?
Yes, if you are comfortable working on brake systems. The process involves unscrewing the old switch, quickly screwing in the new one to minimize fluid loss, and then bleeding the brakes to remove any air from the system. If you are not familiar with bleeding brakes, it is best to have a mechanic perform the job.
Are there any recalls for the brake light switch on my Studebaker?
No recalls were found for the 1960 Studebaker 5E7D related to the brake light switch during a search of the NHTSA database and other public records.
Why do my brake lights only work when I stomp on the pedal?
This is a classic symptom of a failing hydraulic brake light switch. It means the internal diaphragm has become stiff and requires much more pressure to activate the lights. The switch should be replaced immediately.
Technical Specifications
OEM Part Numbers: 666858 (Reference for 1942-66 Studebaker, verify)
Hydraulic Pressure Activated, 1/8-NPT thread
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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.