Standard Ignition TS-103 Engine Cooling Fan Switch

Engine Cooling Fan Switch for Subaru Standard

Standard Ignition TS-103 is an engine cooling fan switch with a 12-volt electrical rating, round plug-in connector, and male bullet terminal. It is built with a metal housing and brass finish for direct replacement service on select Subaru Standard applications.

Key Features

• Engine cooling fan switch for temperature-based fan control
• Fits 1977-1979 Subaru Standard
• 12V electrical specification
• Plug-in attachment method with round male connector
• Male bullet terminal, single-terminal design
• 16mm x 1.50 thread size
• Metal housing with brass finish
• Open at idle configuration
• Standard Ignition TS-103 replacement part

Detailed Description

Standard Ignition TS-103 is an engine cooling fan switch used in cooling system control circuits where a threaded, temperature-actuated switch is required. The round connector, male terminal, and 16mm x 1.50 thread size support direct-fit replacement on listed Subaru Standard vehicles from 1977 through 1979. This part cross-references FS317 and SW503 for the same application. When replacing a worn cooling fan switch, TS-103 helps restore proper fan engagement behavior in the vehicle’s cooling system.

What It Is Used For

• Cooling fan does not cycle on at the correct temperature
• Fan operation becomes inconsistent during idle or low-speed driving
• Temperature switch shows electrical or terminal wear
• Threaded switch replacement is needed during cooling system service
• Restoring factory-style fan control on Subaru Standard models

Installation Notes and Tips

Verify the thread size, connector style, and terminal configuration before installation. Match the existing switch location and ensure the cooling system is properly serviced before replacing the part. Confirm the electrical connection is secure and inspect the mating connector for corrosion or damage.

Quality Assurance

Standard Ignition manufactures replacement electrical components for automotive service applications. TS-103 is built with a metal housing and brass finish to support dependable fitment on the listed Subaru Standard vehicles.