New windshield washer pump not working

[Andzzz]

General description of washer pump circuit:

Power is supplied from F44 in accy, run, and start. Power is applied directly to the washer pump on the violet/white wire. Ground to the pump is on the brown/violet wire and grounds through the WWM.

1. Check for 12V on the violet/white wire in accy, run, and start. If no power, then you have a power supply problem. Check fuse and wiring for faults.
2. Jump the pump connector brown/violet wire side to chassis ground. If the pump does not activate you have a bad pump or connection at the pump.
3. Pull the x285 connector from the WWM and jump pin 10 (still brown/violet wire) to chassis ground. If the pump does not activate, you have a bad wire or connection between the pump and the WWM.
4. Reconnect x285 and jump pin 11 (a different brown/violet wire) to chassis ground. This simulates using the washer switch. If the pump now activates, you have a bad washer switch.
5. If the pump did not activate on step 4, verify all the grounds for the WWM. Disconnect x285 again. Do a continuity test between chassis ground and each of the x285 pins 7 & 15. Check for 12V on pins 2, 8, & 14. If all these check out, you have a bad WWM.


Connector x285 is a blue 15 pin connector and can be located with the WWM behind the glovebox. Looking at the connector face with the 8 pins on top, pins are numbered

8  7  6  5  4  3  2  1
 15 14 13 12 11 10  9

Ok, pulled the glove box out and went through Richard's list above. Got to step 4 and everything works fine, so looks like I have a bad washer switch. Not something I really want to tackle so its going in to my local BMW mech - am lucky enough to have a BMW trained independent guy locally so its not dealer prices!

Thanks again for the fault finding process Richard

[MrToSlo]

i've checked 1 and 2 and they passed.

for 3, 4 and 5 i'm supposed to test the windshield washer relay module located behind the glove box right?

[Andzzz]

i've checked 1 and 2 and they passed.

for 3, 4 and 5 i'm supposed to test the windshield washer relay module located behind the glove box right?

Yes, for 3 with the module out. Step 4 plugged back in and jumpered in back of connector.

[RAYZR]

I have exactly the same problem I am thinking it is an earth problem as when I put a wire in one of a the holes on the water pump and ground it everything works fine without pulling the lever on the steering column