Quick GM3 and washer question

[Rory530d]

The washers on my 530d 2003 stopped working
i striped the arch liner and all the pipes are present and correct, the headlamp washer works fine. Both the intensive wash and normal wash don't work

Interestingly I checked the plugs with a meter, the headlamp wash is at 0v and goes to 12v when the stalk is pulled. The washer bottle pump is at 8v all the time(with ignition on) and goes to 11v when stalk is pulled
i swapped the intensive pump onto the normal wiring, and nothing and vice versa. The intensive pump has 0v the whole time.

Does this mean faulty gm3 module? A local place has one from a 530i petrol 2003 module. If I bought it and swapped it would it cause problems with keys starting etc?

Have a few afternoons to sort this before the mot next week so speedy replies appreciated

Cheers guys

Rory

[JimLev]

I don't have headlight or intensive wash in my car, I'm just looing at a schematic.
F2 powers K2 which is called the headlight washer module, that feeds the intensive washer pump and the headlight washer pump.
K2 should be a relay in the DME box.
The washer pump should be powered directly from the GM.