Thanks for the info. Apart from a multi meter, I also have a circuit tester. Basically it creates a tone that you can chase along the loom using a wand. In theory if their is an open circuit or short the wand will “sense” the fault. So far from pump plug to column, via relay seems good.
Both plugs for the washers left & right have the twin LGB leads. So far I have not actually taken off the column stalk as it didn’t want to come out, but think that was more me being too careful. Does anyone know if the black insulated lead that is part (tail) of the switch is actually the wash wipe circuit?
No sign of damage but it is tightly wound around the column switch & could be the area causing the problem. Can’t get the tester on it at that point.
Thanks.


4/4 Ivory 4.1:1 axle, Mercedes A200 AMG