Washer Fluid Heater: Description and Operation

Wet-Arm Heater (NAH)

The washer fluid in the washer fluid hose is heated electrically in the wiper arm.
There is a connector at the lower end of each wiper arm. The washer fluid hose is routed through this connector to the washer nozzle outlet at the end of the wiper arm.

A constant voltage wire, which is heated by the application of current, is integrated in the washer fluid hose. The constant voltage wire extends the full length of the washer fluid hose in the wiper arm.