Standard Ignition Brake Light Switch SLS-91
Standard Ignition Brake Light Switch SLS-91 - view 2
Standard Ignition Brake Light Switch SLS-91 - view 3
Standard Ignition Brake Light Switch SLS-91
Standard Ignition Brake Light Switch SLS-91 - view 2
Standard Ignition Brake Light Switch SLS-91 - view 3

Standard Ignition Brake Light Switch P/N:SLS-91

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$18.99
MPN: SLS-91
Item Package Quantity: 1
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Standard Ignition Brake Light Switch P/N:SLS-91
Standard Ignition Brake Light Switch P/N:SLS-91
$18.99

Keep your brake lamps switching on the instant you hit the pedal with the Standard Ignition Brake Light Switch (P/N SLS-91). This stoplight switch completes the circuit that powers your brake lights when the pedal is applied, so following traffic gets the signal. It drops in as a direct-fit replacement for the 1976-1977 Ford Custom 500, 1975-1977 Ford Granada, 1976-1978 Ford LTD, 1975-1979 Ford Thunderbird, 1975-1979 Lincoln Continental, 1975-1976 Lincoln Mark IV, 1977-1979 Lincoln Mark V, 1975-1978 Mercury Grand Marquis and 1975-1977 Mercury Marquis — see the Buyer's Guide tab for engine-level details.

  • Low-loss conductors: Copper alloy conductors deliver strong electrical conductivity with low resistive losses.
  • Reduced arcing: A special-design spring and contact arrangement helps cut arcing for extended service life.
  • Built to hold up: Brass or high-impact composite housings are used as specified, backed by robust design and high-grade materials.
  • Fully tested: Each switch is 100% tested to verify both mechanical and electrical switching performance.

From a global manufacturer of original-equipment ignition products that maintains quality control from componentry through finished product.

Interchange: S298 · F4822 · SL211 · C9AZ13480A · D5LY13480A · SW1253 · 12309610 · 1972510

This part cross-references / interchanges with the following part numbers:

S298, F4822, SL211, C9AZ13480A, D5LY13480A, SW1253, 12309610, 1972510

Frequently Asked Questions

What does this brake light switch do?

It completes the electrical circuit that powers your brake lights when the brake pedal is pressed, signaling drivers behind you.

Will the SLS-91 fit my vehicle?

It's a direct-fit replacement for applications like the 1975-1979 Ford Thunderbird, 1975-1979 Lincoln Continental and 1975-1978 Mercury Grand Marquis. Check the Buyer's Guide tab for the full list.

What are some signs this switch may need replacing?

Brake lights that stay off when you press the pedal, stay on constantly, or work intermittently can be signs the switch may need replacing. Diagnose the cause before replacing.

What is the switch made of?

It uses copper alloy conductors, and the housing is brass or high-impact composite as specified for the application.

Is this switch tested before it ships?

Yes. Each unit is 100% tested to verify both its mechanical and electrical switching performance.

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