I just fitted a tow bar with its electronics to my Citroen C4 and now have an electrical fault - help! | Ask Honest John

I just fitted a tow bar with its electronics to my Citroen C4 and now have an electrical fault - help!

I have just fitted a tow bar and electrics to a 2005 Citroen C4 Coupe. All trailer lights and buzzer work but when I press brake pedal the rear wash wipe operates. Any ideas what I've done?

Asked on 24 June 2010 by P CRR

Answered by Honest John

You have interfered with the CANbus electrics by which various components share the same power cable and confused the electronics. This was not a DIY job and I wonder about the legality of it, as tow bars now have to be EC type-approved.

Tags: european law towbars electrical faults

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Citroen C4 (2004 - 2010)

Brave styling, decent quality interior and excellent crash test ratings. 1.6 HDi EGS qualifies for £30pa tax. Good compromise between ride and handling