C5X7 Tourer rear wiper and spraying issue

[Gregor]

Hi.

So it's time for a new research to keep me busy with my C5X7 tourer....

After solving A/C (condenser fan) problem, rear passenger door hinge replacement, my citron gave me a new reason for headache. Rear wiper and washing for boot glass starts to spray and wipe on it's own, without being triggered by me. Any ideas where to start searching to remove this issue? Motor has been changed last year, so it should not be the cause of the problem....

Regards.
Gregor

[GiveMeABreak]

Hi Gregor

My first thoughts on this are towards the rear wiring loom as it enters the rear tailgate. The wires can become worn at the weak point, causing a break in the sheathing and then cause issues. The wiring should enter at the rear top left of the tailgate, so may take some investigation there.

The only other issue of self-wiping I am aware of is only regarding the front wipers with the headlamps also switching on and off, but not the rear and not the wash.

[Gregor]

thanks for the pointing!

[wheeler]

How often does it happen & is there any pattern to it?
Earlier Citroen models had issues with com2000 units (the combined wiper & lighting stalk units) & this could be one of the symptoms. Later ones like on the X7 C5 seem to be a bit more reliable though.
Might also be worth unplugging all the connectors on the BSM (under bonnet fusebox) & check for any signs of water damage.

[Gregor]

Hi. So far I couldnt find any patern and happens 1-2 times a week. Sometimes at car start-up other time while driving... Cables at boot door gap seem fine....

Thank you.