Probably because it is one...
emilo:
The window washer fluid is heated by the engine coolant water and is not electrical heated...
The only wires that go to the window washer container is the one for the pump (front) and level indicator light (top).
The headlight, indicator and horn wires run between the washer container and fender... So I don't know what caused the smoke in your car...
greetingz,