1 minute ago, Tin82 said:

It was set to DC of course. But good tip on measuring with battery ground. Just hoping for a bad connection in the loom by now. Faulty BCM would be a pain. 

 

Another thought. The xenon's have a separate pump. I also measured voltage on that pump. Same result. But the xenon's don't spray always when I use the window washer. Is there a way to directly activate the xenon washer?

Usually headlight washers are every 4-5 screen washes iirc.

You maybe able to use VCDS to actuate, but won't work of course if wires are duff.

Thank you for the input. Sounds like I will need to use vcds for the BCM input measure data and hopefully activate xenon's washers with vcds

Okay. 

 

Checked the BCM advanced measuring data:

 When I press of push the stalk the washer system changes to active for just 1 second. Even tough I push of pull the stalk for longer.

 

I was able to use the xenon's washers via vcds. They worked!

 

There was also an option to activate the front and rear washer via vcds. But they did not work. 

 

No fault codes  present.

 

It looks to me the BCM deactivates the washer after 1 second because of a too high current. 

Well that's a result then for you, now we can eliminate fault with headlight washer.

 

Just to begin looking at other motor.

1 minute ago, varooom said:

Well that's a result then for you, now we can eliminate fault with headlight washer.

 

Just to begin looking at other motor.

Yep. I did the measuring with the multimeter after I tested the pump dismantled from the resorvoir. So maybe the BCM already cut the power to.it

9 minutes ago, Tin82 said:

Okay. 

 

Checked the BCM advanced measuring data:

 When I press of push the stalk the washer system changes to active for just 1 second. Even tough I push of pull the stalk for longer.

 

I was able to use the xenon's washers via vcds. They worked!

 

There was also an option to activate the front and rear washer via vcds. But they did not work. 

 

No fault codes  present.

 

It looks to me the BCM deactivates the washer after 1 second because of a too high current. 

Now we are getting somewhere  You are right about current monitoring, if its too high then there is a short in the wiring or in the pump itself. If the circuit is open it may explain why you arent getting a voltage. Its a pain but the 2 things i would do now

- Remove the pump, power it directly from the battery with 2 pieces of wire, see if you can get it to run

- Disconnect the bcm end and pump end - load test both of the wires with a 21w bulb and see if you have any issues. If youre unsure how to loadtest, google it, its pretty straight forward. Personally id still be looking at the pump first, try and run it. Or if the plugs are the same, swap the plug for both pumps and see if you can now operate the front washers with the headlight washer activation. 

Great. Thanks for the help! 

 

Before I load test, I will leave the car locked en shutdown for an hour. To be sure the BCM gives power. Than connect a bulb to the pump end. Just to see it it lights up.

 

Still not sure why the BCM did not throw a fault code. If it cuts the power, it must be able to throw a fault code. 

Edited 8 August, 20223 yr by Tin82

We await your findings, popcorn is ready to eat almost here 😄

On 08/08/2022 at 16:54, varooom said:

We await your findings, popcorn is ready to eat almost here 😄

I think the popcorn is finished by now, but I have found the time to work in the car.

 

The pump ran on a 12v supply. But sounded a bit weird so ordered a new pump. 

Load testing of the wires showed there was nothing wrong with the wiring. (thank God)

 

Installed the new pump.

Put the car on without motor running:

Pump did not work.

After starting the engine:

Only the rear window washer worked.....

 

After closing the bootlid also the front washer worked.

 

So top tip: Start the car and  close the bootlid before testing.

 

Thank you all for your help!

Yup front wipers need bonnet closed to work, glad you got it all functional, top work 🤝

I have the same issue, I changed the motor and still no joy. Fuses and relay all ok.

Did the OP find what to original issue was?

On 27/04/2026 at 10:04, Knowhereman74 said:

I have the same issue, I changed the motor and still no joy. Fuses and relay all ok.

Did the OP find what to original issue was?

With me it was the pump. It took me long to diagnose because the pump ran fine on a 12v power supply. Because of this I thought the pump was fine, but it drew to much current while running so the BCM stopped supplying power to it. The new pump has been running fine for almost 4 years now.

On 27/04/2026 at 10:04, Knowhereman74 said:

I have the same issue, I changed the motor and still no joy. Fuses and relay all ok.

Did the OP find what to original issue was?

Did you change the correct pump? On Xenon models there are two pumps installed.