[Savage]

I presume these come on automatically when the front heated screen is on as I cant find a reference to them separately ?

 

[Sprower]

I'm assuming they are always on and heat the washer water whenever it's sprayed. E.g. Even if the heated windscreen has been turned off (you've cleared the ice!) but temperature is around freezing, it prevents the pipes from freezing?

 

[Zach]

Should come on when the temp is 5c or below.