Standard Ignition LS-249 Neutral Safety Switch

Neutral Safety Switch for Ford and Mercury Applications

Standard Ignition LS-249 is a neutral safety switch built for dependable electrical switching in classic Ford and Mercury vehicles. It uses a robust housing, copper alloy conductors, and tested mechanical and electrical performance to support accurate starter circuit operation.

Key Features

• Neutral safety switch for automatic transmission start-circuit control
• Copper alloy conductors for strong electrical conductivity and reduced resistance
• 100% tested for mechanical and electrical switching performance
• 1 connector location with no connector supplied
• Male blade terminals: 2 terminals total
• Direct-fit service part for select Ford E-Series, F-Series, Mustang, Thunderbird, LTD, Mercury Colony Park, and Jeep CJ5 applications

Detailed Description

Standard Ignition LS-249 is engineered for vehicles that rely on a neutral safety switch to allow cranking only in Park or Neutral. The design focuses on stable signal transfer and consistent switch action, which is important on older Ford and Mercury platforms where worn electrical contacts can cause intermittent starting concerns. This part number, LS-249, is listed for a wide range of classic applications including 1955-1966 Ford Thunderbird, 1964-1966 Ford Mustang, 1965-1966 Ford LTD, and select Ford truck and van models. It also cross-references National 710412 for the same application.

Common Issues This Part Can Help Address

• No-crank condition when the transmission is in Park or Neutral
• Intermittent starter engagement
• Starter circuit interruption caused by worn switch contacts
• Electrical switching problems related to aging transmission-mounted components
• Starting concerns on classic Ford and Mercury vehicles with original-style switch layouts

Installation Notes and Tips

• Verify the transmission range and connector style before installation.
• Match the blade terminal layout to the vehicle harness before connecting.
• Inspect the shift linkage and adjustment points, since misalignment can affect switch operation.
• Confirm the vehicle application by year, make, model, and notes such as serial-number breakpoints where listed.
• Compatible With 1971-1979 Ford E-100 Econoline, 1975-1979 Ford E-100 Econoline Club Wagon, 1975-1979 Ford E-150 Econoline, 1975-1979 Ford E-150 Econoline Club Wagon, 1975-1979 Ford E-250 Econoline, 1975-1979 Ford E-250 Econoline Club Wagon, 1975-1979 Ford F-150, 1970-1979 Ford F-250, 1975-1977 Ford E-350 Econoline, 1977 Ford E-350 Econoline Club Wagon, 1970-1975 Ford F-100, 1971 Ford E-100 Econoline from Serial No. K00001, 1965-1966 Ford LTD, 1964-1966 Ford Mustang, 1955-1966 Ford Thunderbird, 1965-1966 Mercury Colony Park, 1957-1959 Mercury Colony Park, and 1959-1960 Jeep CJ5.

Quality Assurance

Standard Ignition builds this LS-249 neutral safety switch with durable materials and validates both mechanical action and electrical performance before release. The part is designed to meet the service demands of technicians working on classic Ford, Mercury, and Jeep applications.