1963-1964 Studebaker 8E7 Brake Light Switch Replacement Guide
Understanding the unique hydraulic brake light switch in your Studebaker Champ truck and how to replace it.
- The original part is a hydraulic pressure switch, not a mechanical one.
- Aftermarket hydraulic switches are known to fail prematurely when used with silicone (DOT 5) brake fluid.
- The primary aftermarket brand available is Standard Ignition.
- Brake bleeding is required after replacement to ensure safety.
The Hydraulic Switch: A Classic Studebaker Quirk
Unlike modern vehicles that use a mechanical switch at the brake pedal, your 1963-1964 Studebaker 8E7 truck uses a hydraulic pressure switch. This design was common for the era. The switch has threads that screw into the brake system's master cylinder, and it is activated by fluid pressure, not the pedal's physical movement. While simple, these switches are a known failure point, especially with age.
Choosing Your Aftermarket Replacement Part
Original OEM switches are no longer manufactured. Your only option for a direct-fit replacement is a new aftermarket part. Standard Ignition is the primary brand available that produces a compatible hydraulic switch for your truck. These switches are designed to replicate the function of the original part and are the most straightforward replacement option.
Warning: Silicone Brake Fluid and Switch Failure
A critical consideration for Studebaker owners is the type of brake fluid used. Many owners of classic cars switch to silicone brake fluid (DOT 5). However, it is widely reported in the Studebaker community that silicone fluid can cause premature failure of modern reproduction hydraulic brake light switches. If you are using silicone fluid, you may experience repeated switch failures. For a direct replacement switch, standard DOT 3 brake fluid is recommended.
Cost of a New Brake Light Switch (1963-1964 Studebaker 8E7)
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (e.g., Standard Ignition) | $15 - $16 |
| Shop Labor for Installation | $60 - $120 |
Pro Tip: Replacing this switch is a simple task, but it requires bleeding the brakes afterward to remove air from the hydraulic system. This step is critical for brake safety. If you are not comfortable bleeding your brakes, it is best to have a professional mechanic perform the installation.
Frequently Asked Questions (FAQ)
Where is the brake light switch located on my Studebaker 8E7?
The brake light switch is a hydraulic pressure switch located outside the cabin. You will find it screwed into the master cylinder or a nearby brake line junction block on the frame. It will have two electrical wires connected to it.
How can I test my brake light switch?
After confirming your brake light bulbs and fuse are good, you can test the switch. Locate the switch and unplug the two wires. Use a small piece of wire to safely connect the two wire terminals together. If the brake lights turn on, the switch is faulty and needs to be replaced.
Are there any recalls for the brake light switch on my Studebaker?
No, there are no active NHTSA recalls or Technical Service Bulletins (TSBs) for the brake light switch on the 1963-1964 Studebaker 8E7.
What is this 'mechanical switch conversion' I've heard about?
Due to the known reliability issues with reproduction hydraulic switches, some owners modify their trucks to use a more modern, reliable mechanical switch mounted by the brake pedal. This is a custom job that involves fabricating a bracket and running new wires. While it solves the problem of repeated hydraulic switch failures, it is not a direct replacement and requires more work than installing a standard aftermarket part.
Technical Specifications
OEM Part Numbers: 666858
Hydraulic Pressure Activated, Screw-In Type
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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.