Standard Ignition US-98 Ignition Switch

Ignition Switch for Ford and Mercury Applications

Standard Ignition US-98 is a column-mounted ignition switch built for direct replacement service on a wide range of Ford, Mercury, and Lincoln vehicles. It uses copper alloy conductors for strong electrical conductivity and low resistive loss, helping maintain consistent starting and accessory switching performance.

With a bolt-on attachment, female rectangular connector, and 11 blade terminals, this ignition switch is built for proper fit and reliable mechanical and electrical operation in service work.

Key Features

• Column-mounted ignition switch for Ford, Mercury, and Lincoln applications
• Bolt-on attachment method for secure installation
• 1 female rectangular connector
• 11 male blade terminals
• Plastic finish with white housing
• Copper alloy conductors for efficient electrical transfer
• 100% tested for mechanical and electrical switching performance

Detailed Description

Standard Ignition US-98 is an OE-style ignition switch designed for vehicles such as the Ford Mustang, Ford Thunderbird, Mercury Cougar, and Mercury Grand Marquis. It is also used across additional Ford and Lincoln platforms from the late 1970s through the mid-1990s, making it a practical replacement for worn or failing column ignition components. The part number US-98 is commonly searched by technicians and DIY repairers looking for a dependable ignition switch replacement for classic Ford and Mercury platforms.

This part cross-references Standard Ignition US98T and IS79 for the same application.

What This Part Helps Fix

• No-start condition caused by a worn ignition switch
• Intermittent crank or accessory power loss
• Key position issues between OFF, RUN, and START
• Electrical contact wear inside the steering column switch
• Inconsistent power delivery to ignition circuits

Installation Notes and Tips

Compatible With column-mounted applications only. Verify the connector shape, terminal count, and mounting style before installation. On Ford Mustang, Ford Thunderbird, Mercury Cougar, and Mercury Grand Marquis applications, confirm the steering column switch layout matches the original part. The US-98 should be matched to the vehicle’s original connector and terminal configuration for proper operation.

Quality Assurance

Standard Ignition builds this switch with robust materials and copper alloy conductors, then tests each part for both mechanical movement and electrical switching performance. That process supports consistent service results on Ford, Mercury, and Lincoln ignition systems.