Brake Light Switch Guide for the 1959 Studebaker Deluxe
Keep your classic on the road and signaling safely with the right replacement brake light switch.
- The 1959 Studebaker Deluxe uses a hydraulic pressure switch, not a mechanical one.
- Failure is common and results in a critical safety issue; do not drive if your brake lights are out.
- The Standard Ignition SLS27 is a widely available aftermarket replacement, but it is not compatible with DOT 5 silicone brake fluid.
- Replacement is a simple DIY task, but you must bleed the brakes afterward to ensure safety.
Is Your Studebaker's Brake Light Switch Failing?
The hydraulic brake light switch used on the 1959 Studebaker Deluxe is a component with a known history of reliability issues. These switches are a common failure point, often leading to brake lights that don't work at all or only work when you press the brake pedal very hard. Because this is a critical safety feature, a non-working switch requires immediate attention.
Critical Safety Warning
Driving with malfunctioning brake lights is extremely dangerous and illegal. A faulty brake light switch means drivers behind you won't know you are slowing or stopping, dramatically increasing the risk of a rear-end collision. Do not drive your vehicle if you know the brake lights are not working.
Common Symptoms of a Bad Brake Light Switch
- Brake Lights Don't Turn On: This is the most obvious and serious symptom. If the bulbs and fuses are good, the switch is the next most likely culprit.
- Intermittent Brake Lights: The lights may flicker or only work sometimes. This can be a sign of failing internal contacts in the switch.
- Brake Lights Stay On: Less commonly, the switch can fail in the 'on' position, leaving your brake lights constantly illuminated. This can be caused by a faulty switch or incorrect brake pedal adjustment.
- Brake Fluid Leak: Since it's a hydraulic part, the switch itself can develop a leak. Look for signs of brake fluid around the switch body and its connection to the master cylinder.
Choosing the Right Aftermarket Part
For a vintage vehicle like the 1959 Studebaker Deluxe, finding New Old Stock (NOS) OEM parts is nearly impossible. The most practical solution is a new aftermarket replacement. Fortunately, parts support for Studebakers is surprisingly good.
Brand Spotlight: Standard Ignition (SMP)
Standard Ignition is a well-established brand that produces a wide range of automotive electrical components. Their replacement hydraulic brake light switch (Part No. SLS27) is a common choice for many classic cars, including Studebakers. Reviews for this part are generally positive, with users noting that it is a functional replacement that gets their brake lights working again. However, like many hydraulic switches of this type, their long-term durability can be inconsistent; some owners of classic cars report these switches failing after a year or two. Despite this, it remains the most accessible and straightforward replacement option.
A Note on Brake Fluid
The original-style hydraulic switches are often not compatible with modern DOT 5 silicone brake fluid. Using silicone fluid can cause the seals inside the switch to fail quickly. The Standard Ignition SLS27 switch is not recommended for use with silicone brake fluids. Stick with the recommended DOT 3 brake fluid for your vehicle to ensure the longevity of the replacement switch.
Replacement Cost
Replacing the brake light switch is one of the more affordable repairs for your Studebaker.
| Part Type | Price Range |
|---|---|
| New Aftermarket (Standard Ignition) | $15 - $20 |
| Shop Labor | $50 - $100 |
Note: Labor costs are an estimate and can vary by location and shop. The key factor in labor is the need to bleed the brakes after replacement.
Frequently Asked Questions (FAQ)
Where is the brake light switch located on my 1959 Studebaker?
The brake light switch is not inside the car by the pedal. It is a hydraulic switch located under the hood, screwed directly into the master cylinder or a nearby brake line junction block. It will have two wires connected to it.
Can I replace the brake light switch myself?
Yes, this is a DIY-friendly job for someone with basic mechanical skills. The process involves unscrewing the old switch, screwing in the new one, and reconnecting the wires. 🎬 Watch this step-by-step guide on replacing a brake light switch. However, because it is part of the hydraulic brake system, you must bleed the brakes afterward to remove any air that entered the system. Failure to properly bleed the brakes can result in a soft or non-functional brake pedal.
Should I upgrade to a mechanical brake light switch?
Many classic car owners, including those with Studebakers, opt to convert to a more reliable mechanical switch. This involves fabricating a small bracket to mount a modern switch near the brake pedal arm. This upgrade eliminates the common failure point of the hydraulic switch and is not affected by brake fluid type. While it is a more involved project, it offers a permanent solution to a recurring problem.
🎬 Learn how to install a mechanical brake light switch upgrade.Do I need any special tools to replace the switch?
You will need basic hand tools, including a wrench to fit the switch. The most important tool you will need is a brake bleeding kit or a helper to assist you in bleeding the brakes properly after the new switch is installed.
Helpful Videos
Technical Specifications
OEM Part Numbers: 666858
Type: Hydraulic Pressure Switch, Terminals: 2, Attachment: Screw-In
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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.