Horn and wipe screen problem

[Shomysss]

Hi,
I have C3 1.6 Petrol exclusive.
My horn and pump for wash window few days work and few days doesn't work.I don't know why .I checked fuses and pump everything Is good.
Does C3 have relays for that or not?

Thanks

[C3CAR]

Not

It's all solid state or black box BSM module


I had a horn go intermittent and it turned out the actual horn sounder was faulty.

[Shomysss]

Everything is weird.For example ten days bought comand work properly and next ten nothing.In same time only that two comand work or not.

Maybe Com2000 is problem?what do you think?

[Ozvtr]

Yes, for a 2003 C3 the BSM does have relays.

But the problem I have is that apparently these things all work or they don't...at the same time?

Fuse F14 in the glove box fuse box supplies power to the coils of the horn relay and reversing relays for the washer. I would check that fuse for serviceability and that it fits snugly in the fuse holder. Remember it's intermittent, so it might look right but not be right.

[Shomysss]

But the problem I have is that apparently these things all work or they don't...at the same time?

Exactly that.In same time work or not.

Fuse F14 in the glove box fuse box supplies power to the coils of the horn relay and reversing relays for the washer. I would check that fuse for serviceability and that it fits snugly in the fuse holder. Remember it's intermittent, so it might look right but not be right.

I will check that later.

Yes, for a 2003 C3 the BSM does have relays.

Where are these relays?

[Ozvtr]

Where are these relays?

They are inside the BSM (engine bay fuse box). They are not "user serviceable", they are soldered to the printed circuit board. There are 3 in this case. 1 for the horn and 2 for the washer motor. There are 2 for the washer because the motor runs forward and backwards (front washer, rear washer). But power for all those relay coils comes from F14 in the BSI.

[Shomysss]

Thanks a lot.

I will try to dismatle BSM and check F14.
How to inspect that relays?
Do you know some method?

[Shomysss]

I supposed it's some of these from attach?

[Ozvtr]

Inside_BSM_Modle_are_relays-2.jpg (100.99 KiB) Viewed 365 times

This relay is a double relay. That is; it is 2 relays in one. Half (one) is used for the horn half (one) is used for the washer.
Could be the relay or could be a bad solder joint?

[Ozvtr]

Inside_BSM_Modle_are_relays-2.jpg (100.25 KiB) Viewed 365 times

Power for the relay COILS comes in on pin 9 of the 10 way "black" connector.
You should check for power here (from the BSI at the loom connector) when the horn/washer stops working.