This can be avoided by fitting an expensive manufacturer approved plug-in wiring kit when your tow bar is installed. This should resolve any problems with the diagnostic or fault finding systems, but it won't be cheap. Fitting this Universal Bypass Relay to your car between the wiring system and trailer plug socket bypasses. 2) You will notice that there are 8 (9 on some relays depending on manufacturer) wires coming out from the relay which apart from the grey wires, match the colours of the wires in the black 7-core cable. These colours are the standard colours for towbar wiring - unfortunately there is no such standard for vehicle lighting wiring colours. An assistant sitting in the driving seat is useful at.
CITROEN RELAY VANS 2006- PFC5B MATERIALS. If reversing sensors are present disconnect wiring loom on right hand side . 2.) Undo bolts and Nuts to remove rear crash beam. Note: On vehicles 2007 onwards, the rear mounting holes have. WITTER-TOWBARS Support technique Numéro Vert : 0 805 102 860 µW0001PFC5B-FIT$020802130000sÄ.. A how to guide (or how I fitted a towbar to a Fiat Ducato guide) same for a Citroen Relay or Peugeot Boxer 2006 onwards (2020 van in video)The Parking Sensor.