Standard Ignition SLS-70 Brake Light Switch

Brand Standard Ignition SLS-70
Connector Gender Male
Functions Switch
Terminal Gender Male
Terminal Type Blade
Fits Ford, Mercury, and Lincoln · 25 vehicles

Robust design. Built with high-grade materials for demanding service use.

Reduced arcing. Special spring and contact arrangement helps extend service life.

OE-quality manufacturing. Made by a global original-equipment ignition products manufacturer.

Cross-references Four Seasons 58099, 1S5371 and 53-54494 for the same application. See all 10.

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Brake Light Switch for Ford and Mercury Applications

The Standard Ignition SLS-70 brake light switch is built for dependable stoplamp operation in classic Ford and Mercury vehicles. It uses a male connector with two male blade terminals and is designed for direct electrical switching performance in the brake pedal circuit.

Key Features

  • Brake light switch with one male connector
  • Two male blade terminals for straightforward circuit connection
  • Robust housing construction using brass or high-impact composite materials, depending on application
  • Special spring and contact design to reduce arcing and extend service life
  • Copper alloy conductors for strong electrical conductivity and low resistive loss
  • 100% tested for mechanical and electrical switching performance
  • Standard Ignition part number SLS-70

Detailed Description

Standard Ignition SLS-70 is a brake light switch engineered for service work where consistent stoplamp activation matters. It is a direct-fit electrical switch for a range of Ford Bronco, Ford Mustang, Ford F-Series, Ford LTD, Mercury Montego, and Lincoln Continental applications from the late 1960s through the 1970s. This part cross-references Four Seasons 58099 for the same application. The SLS-70 combines durable housing materials, copper alloy conductors, and a contact design intended to maintain stable switching performance in the brake pedal circuit.

What It Helps Solve

  • Brake lights that do not illuminate when the pedal is pressed
  • Intermittent stoplamp operation caused by worn switch contacts
  • Electrical resistance issues in the brake light circuit
  • Delayed or inconsistent brake lamp response
  • Replacement needs for aging Ford and Mercury brake light switch assemblies

Installation Notes and Tips

Verify connector style, terminal type, and vehicle application before installation. This brake light switch uses a male connector with two male blade terminals, so matching the existing harness and switch mounting style is important for proper operation. Confirm the brake pedal switch adjustment after installation so the stop lamps activate at the correct pedal position.

Quality Assurance

Standard Ignition states that its stoplight switches are fully tested for both mechanical action and electrical switching performance. The brand also notes controlled manufacturing from component selection through finished product, supporting consistent quality for service replacement use.

Compatible Vehicles

  • Fits 1975-1978 Ford LTD
  • Fits 1967-1977 Ford Bronco
  • Fits 1967-1978 Ford Mustang
  • Fits 1967 Ford F-100
  • Fits 1967 Ford F-250
  • Fits 1967 Ford F-350
  • Fits 1968-1970 Mercury Montego
  • Fits 1969 Lincoln Continental
This part fits 25 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1978FordLTD——N/A—
1977FordBronco——N/A—
1977FordLTD——N/A—
1976FordBronco——N/A—
1976FordLTD——N/A—
1975FordBronco——N/A—
1975FordLTD——N/A—
1974FordBronco——N/A—
1973FordBronco——N/A—
1972FordBronco——N/A—
1971FordBronco——N/A—
1971MercuryMontego——N/A—
1970FordBronco——N/A—
1970MercuryMontego——N/A—
1969FordBronco——N/A—
1969LincolnContinental7.5LV8N/A—
1969MercuryMontego——N/AFrom 11/18/68
1968FordBronco——N/A—
1968FordMustang——N/A—
1968MercuryMontego——N/A—
1967FordBronco——N/A—
1967FordF-100——N/A—
1967FordF-250——N/A—
1967FordF-350——N/A—
1967FordMustang——N/A—
Directly replaces or cross-references 10 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 580991S537153-5449489057759C6OZ13480AEG1081F4812S259SL208SL208SB