Help keep your brake lights in step with the pedal with the Standard Ignition Brake Light Switch / Stoplight Switch, part number SLS-79. It fits many vehicles, among them the 1979-1993 Ford Mustang, 1980-1988 Ford Thunderbird and 1993-1996 Ford E-150 Econoline, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list and engine details. The switch closes the brake light circuit when the brake pedal is applied, so the brake lights come on to signal traffic behind you. It opens the circuit again when the pedal is released. Standard lists this part as a stoplight switch, and it is also known as a brake light switch.
Signs this switch may need replacing include brake lights that stay on, brake lights that don't come on when the pedal is pressed, or brake lights that work only intermittently. Bulbs, fuses and wiring can cause the same symptoms, so diagnose the circuit before replacing the switch.
Interchange: 2-8686
28686 · S280 · 8686 · F4837 · SL207 · C9AB13480D · C9AZ13480C · C9AZ13480D · D2AB13480BA · D4VB13480AA · D5DZ13480A · D5LB13480AA · E3ZB13480BA · E3ZZ13480A · E6ZB13480AA · E6ZZ13480A · E9ZZ13480A · SW2239 · 12329700 · 1972409
This part cross-references / interchanges with the following part numbers:
What does a brake light switch do?
It closes the brake light circuit when the brake pedal is applied, which turns on the brake lights to signal traffic behind you. It opens the circuit again when the pedal is released.
Does this Mustang switch fit my 1979-1993 Ford Mustang?
Yes. SLS-79 is listed for the 1979-1993 Ford Mustang and for 1971-1973 Mustang models. Check the Buyer's Guide tab to confirm your exact vehicle.
Is this the Thunderbird switch for a 1980-1988 Ford Thunderbird?
Yes. It is listed as a direct-fit brake light switch for the 1980-1988 Ford Thunderbird, and 1969-1971 Thunderbird models are also listed.
What are signs a brake light switch may need replacing?
Brake lights that stay on, don't come on when you press the pedal, or work only intermittently. Bulbs, fuses and wiring can cause the same symptoms, so diagnose the circuit first.
How is the SLS-79 built and tested?
It uses copper alloy conductors and a special-design spring and contact arrangement intended to reduce arcing. Each switch is 100% tested for mechanical and electrical switching performance.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
