To prevent the wiper blades from freezing fast, the wiper parking area is heated dependent on the outside temperature. The jet nozzle heater for the wash water is connected in parallel to this function.
Undervoltage cutout takes place under the same conditions as for the rear window defogger.
ON: Outside temperature < 3 o C and terminal 15 ON.
OFF Outside temperature > 6 o C or terminal 15 OFF