Standard Ignition TS-173 Engine Cooling Fan Switch

Engine Cooling Fan Switch for Volkswagen and Audi

Standard Ignition TS-173 is an engine cooling fan switch built for radiator-mounted cooling fan control on select Volkswagen and Audi applications. It uses a plug-in attachment method, a rectangular female connector, and two male blade terminals for a direct electrical connection.

With a 12-volt design, metal housing, and 22mm x 1.50 thread size, this cooling fan switch is specified for vehicles that use an open-at-idle switch strategy. Standard Ignition TS-173 is a fitment-based replacement for Volkswagen Jetta, Golf, Passat, Quantum, Cabriolet, Vanagon, Fox, Derby, and Audi 4000, 4000 Quattro, Coupe, and 5000 Quattro radiator applications.

Key Features

• Engine cooling fan switch for radiator-mounted applications
• Plug-in attachment method with 1 rectangular female connector
• 2 male blade terminals for direct electrical connection
• 12-volt electrical design
• Metal housing with white and gold finish
• Open at idle switch actuation
• 22mm x 1.50 thread size
• Standard Ignition TS-173 part number for catalog matching

Detailed Description

Standard Ignition TS-173 is an engine cooling fan switch used to control radiator fan operation on select Volkswagen and Audi vehicles. The switch features a rectangular body, plug-in connection, and female connector layout with two blade terminals, making it a direct-fit style replacement for applications that use this terminal configuration. The metal housing and threaded 22mm x 1.50 mounting design support radiator installation requirements found on many older import cooling systems.

This part cross-references Anchor 8442 for the same application. It is commonly searched as a cooling fan switch for Volkswagen Jetta, Golf, Passat, Quantum, Cabriolet, Vanagon, Fox, and Audi 4000-series radiator fitments. Standard Ignition TS-173 is also referenced by interchange numbers including FS153 and SW556.

What It Helps Address

• Cooling fan that does not switch on at the correct temperature
• Radiator fan operation that is intermittent or inconsistent
• Overheating caused by failed fan switch control
• Electrical connection issues at the radiator-mounted switch
• Replacement needs for worn or corroded original fan switches

Installation Notes and Tips

Verify the connector style, terminal count, and thread size before installation. This switch uses a female connector, two male blade terminals, and a 22mm x 1.50 thread, so matching the original radiator switch configuration is important. Confirm vehicle-specific fitment for the exact year, make, model, and radiator application before ordering. No wiring harness, bulb, mounting bracket, or hardware is included.

Quality Assurance

Standard Ignition supplies electrical and engine management components for service replacement applications. TS-173 is built to match the listed fitment and connector specifications for Volkswagen and Audi cooling fan switch applications.