4010202 Cooling Fan Switch for Polaris Big Boss 400 500 1997-1999

Cooling Fan Switch for Polaris Big Boss 400 & 500

This cooling fan switch for Polaris Big Boss 400 and 500 machines controls the radiator cooling fan circuit, engaging the fan when engine temperature rises; it replaces OEM part 4010202.

Overview

This cooling fan switch for Polaris Big Boss 400 and 500 models keeps engine temperature in check by triggering the fan at the right moment. The switch swaps out the original 4010202 unit on 1997 through 1999 Big Boss machines. It suits riders and mechanics repairing an aging temperature circuit.

Built For Performance

• Replaces OEM part number 4010202
• Threaded body matches the factory fan switch port
• Temperature-activated contact closes the fan circuit on cue
• Sealed electrical connector resists mud and moisture
• Direct-fit replacement for 1997-1999 Big Boss 400 and 500

Fits These Machines

• for Polaris Big Boss 400 (1997-1999)
• for Polaris Big Boss 500 (1997-1999)

On-The-Job Use

• Trail riding where engine temps climb on long climbs
• Utility work with a loaded bed at low speed
• Repairing a Big Boss with a failed temperature switch
• Preventive maintenance on older cooling systems

Specs At A Glance

Good To Know

Q: How do I know if my fan switch has failed? A: A common sign is the cooling fan never coming on when the engine gets hot, or running constantly. Confirm the switch with a multimeter before ordering.

Q: Does this switch require a separate harness? A: No, it plugs into the factory connector on 1997-1999 Big Boss 400 and 500 models. Reuse the original wiring and seal.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.