Standard Ignition US-49 Ignition Switch

Ignition Switch for Ford and Mercury Applications

The Standard Ignition US-49 ignition switch is built for direct replacement service on select Ford and Mercury vehicles. It uses copper alloy conductors for strong electrical transfer and is 100% tested for mechanical and electrical switching performance.

Compatible With 1965-1967 Ford LTD, 1967 Ford Mustang, and 1965-1967 Ford Thunderbird applications, this ignition switch supports reliable key-to-start operation in column-mounted systems. The US-49 is also used on 1967 Ford F-100, F-250, and F-350 trucks, plus select Mercury models.

Key Features

• Standard Ignition US-49 ignition switch for column mounting
• Bolt-on attachment method for service replacement use
• Female round connector with 1 connector and 3 male blade terminals
• Black and gray housing with cast iron and plastic finish
• Copper alloy conductors for low-resistance electrical flow
• 100% tested for mechanical and electrical switching performance

Detailed Description

The Standard Ignition US-49 is an ignition switch replacement for vehicles that use a column-mounted, bolt-on design with a round female connector and three blade terminals. It is engineered with durable materials to maintain proper fit and function, while the copper alloy conductor design helps support consistent electrical conductivity. This part number, US-49, is listed for 1967 Ford F-100, F-250, and F-350 trucks, as well as 1967 Ford Mustang and 1965-1967 Ford LTD and Thunderbird models. It also cross-references Standard Motor Products US-49 for the same application.

Common Problems It Can Solve

• Intermittent no-start conditions caused by worn ignition switch contacts
• Loss of accessory, ignition, or starter circuit function at the column
• Electrical switching issues from heat, wear, or internal contact damage
• Key position problems that prevent normal start and run operation
• Replacement needs after connector or terminal wear in the original switch

Installation Notes and Tips

Verify the column-mounted connector style, terminal count, and attachment method before installation. Confirm vehicle application by year and model, especially on 1967 Ford Mustang, 1967 Ford F-100, and 1965-1967 Mercury Colony Park or Marquis listings. Match the existing round female connector and three blade terminals to the original switch layout for proper fitment.

Quality Assurance

Standard Ignition states that this switch is built from high-grade materials and fully tested to verify both mechanical and electrical switching performance. That testing helps support dependable operation in service replacement use.