Thanks for the cct diagram. E34 is the previous 5 series?
I actually think the relay contacts are fused closed, that is if there is a relay supplying voltage to the pump. Reason being, that even with the ignition off, I still have the 9V to the pump. Most cct drawings I looked at in the ETK CD, show that power to the washer pump is only when the key is in position ACCY, RUN or START.
If the switch provides a ground to give you the 12V potential across the pump, it still doesn't explain why I have 9V across the pump without pulling the lever.
Unless I am getting 3V on the ground side of the pump without pulling the lever from the control module electronics and that is normal.
ghead I'm guessing this 9V constantly across the pump though wouldn't take long to burn it out.
I've been in touch with my local BMW garage on the phone and they told me to call them back after the weekend and they should be able to help me more.
Wires on mine look like Black for + and Brown for -. There might be secondary stripes in the insulation, but didn't take too much notice.
Thinking of just getting a pump and seeing what happens when I connect it up.
What is the Intensive Washer Pump? Do they all have this feature?