Horn and wipe screen problem

This is my Bsm. Everything looks fine.



How to check does Bsi gives signal to Bsm?

Shomysss wrote: ↑Sun Jan 23, 2022 7:15 am This is my Bsm.Everything looks fine.
How to check does Bsi gives signal to Bsm?

You cant, unless you have a CAN BUS decoder. Suffice to say the BSM is communicating over the CAN BUS if your wipers and lights work.

I cant be sure but the solder joints look OK.

Put the BSM back together, install it in the car, plug all the connectors in and check pin 9 as I said in my last post. You can only check pin 9 when the horn IS NOT WORKING! If you don't have a multimeter then I cant help you fault find. You will need to check voltages. You need to find out if the relay coils are getting power or not.

You could try pulling F14 in the glove box out and see if that replicates the fault.

You can only check pin 9 when the horn IS NOT WORKING! If you don't have a multimeter then I cant help you fault find. You will need to check voltages. You need to find out if the relay coils are getting power or not.

I have multimetar.Horn doesn't work now.

How to check pin 9 with mulitimeter?

With the connector plugged in, push the red probe into the back of the connector where the wire comes out. Make contact with the metal pin that the wire is crimped onto. Touch the black probe to an exposed metal part of the chassis.
I think you will need to turn the ignition on.
If you get 12V there the problem is in the BSM (engine bay fuse box). If you don't get any power there the problem is in the BSI (glove box fuse box).

The pictures are just for reference. Your connector is different.

Thanks a lot.I will check later power.
Do you know which wires come from BSM to waherpump?From which connector and pins?

Shomysss wrote: ↑Wed Jan 26, 2022 11:31 am Thanks a lot.I will check later power.
Do you know which wires come from BSM to waherpump?From which connector and pins?

The electrical diagram for the wiper and washer pump appears in the haynes manual. page 12.20 showing BSI and BSM connections to the reversible pump.

With the connector plugged in, push the red probe into the back of the connector where the wire comes out. Make contact with the metal pin that the wire is crimped onto.

This is parameters when horn doesn't work

Do you have the correct contact? The wire colour is light grey or white. I cant tell. It's in the middle between the blue and green/yellow wires.


Open a door and perform this test within 1 minute. If the car goes into stand by it will cut the power to this pin!


Door closed, car asleep.


Door open, car awake.

On this link is my video please watch:

https://youtu.be/F6hwwcfTnlA

And look pictures please

There is a problem with your BSI (the fuse box near the steering wheel).

That power line should come on when the car "wakes up". It should stay on if the engine is running or the system is doing something. If your car is not doing anything it should stay on for 60 seconds then switch off.

My guess is the relay supplying power to the BSM is faulty. Like the BSM the BSI has relays in it too. The relay is inside the BSI and is connected to fuse F14. You can probe F14 in the BSI the same way that you did that electrical connector. You should get 12V when the car is "awake" but I bet you get the same voltages as you did at the BSM.