This procedure addresses a common misconception: the 1966 Chevrolet Corvette was not equipped with ABS (Anti-lock Braking System). ABS was not available on any production vehicle until 1971, and did not appear on Corvettes until the C4 generation in 1986.

Warnings

Preparation

1. Verify the actual brake system configuration on the vehicle - inspect under hood for master cylinder type and check all four wheels for brake component configuration
2. If an aftermarket ABS system is installed, identify the manufacturer and obtain their specific service documentation
3. For original brake system diagnosis, refer to appropriate 1966 Corvette brake system repair procedures instead of this one

Procedure

1. 1

   Vehicle System Identification
   Confirm whether this vehicle has the original 1966 brake system or an aftermarket retrofit. Open the hood and locate the master cylinder on the driver side firewall. The original system will have a dual reservoir cast iron master cylinder with steel brake lines running to all four wheels. There will be NO electronic control modules, wheel speed sensors, or ABS pump assemblies. Check all four wheels for wheel speed sensor rings or wiring - the original system will have none.
2. 2

   Original System Confirmation
   If the vehicle has the original 1966 brake system (no ABS components visible), this procedure does not apply. The vehicle does not have an ABS module to replace. Diagnose actual brake problems using 1966 Corvette brake system procedures covering master cylinder, four-wheel disc brake calipers, brake lines, and proportioning valve.
3. 3

   Aftermarket System Identification
   If an aftermarket ABS system is present, locate any identification labels on the control module, pump assembly, or wiring harness. Common retrofit manufacturers include Bosch, Wilwood, and Hydroboost. Document the manufacturer name, model number, and any visible part numbers. Take photographs of the entire installation including mounting locations and wire routing.
4. 4

   Obtain Manufacturer Documentation
   Contact the aftermarket ABS system manufacturer or search their website for service documentation specific to the identified model. Aftermarket ABS systems vary significantly in component location, mounting methods, electrical connections, and bleeding procedures. Generic ABS service procedures cannot be safely applied without knowing the specific system architecture.
5. 5

   Service According to Manufacturer Specifications
   Follow the aftermarket manufacturer's specific removal, installation, and bleeding procedures for their ABS module. Do not proceed without this documentation. Aftermarket systems may require specialized scan tools for bleeding, specific power supply sequences for initialization, or unique mounting hardware that is not interchangeable between manufacturers.

Reassembly

1. This procedure does not include reassembly steps as the 1966 Corvette did not originally include ABS
2. If servicing an aftermarket system, follow that manufacturer's reassembly and initialization procedures exactly
3. Any aftermarket ABS system will require proper bleeding using manufacturer-specified procedures and tools

Verification

• For original brake system: Verify proper brake pedal height and firmness, check for leaks at all connections, test brake operation at low speed in safe area
• For aftermarket ABS system: Follow manufacturer's verification procedures which typically include scan tool diagnostics, system self-test procedures, and controlled ABS activation testing in safe conditions
• If you were directed to this procedure in error, seek proper diagnosis of the actual brake issue from a qualified technician familiar with early Corvette brake systems

More procedures for this vehicle