Many modern cars have multiplexed or can bus wiring systems. 5738426 vat number.

Smart Universal Fitting 7 Way Bypass Relay Teb7as Towbar
Maypole teb7as wiring diagram. Green wire to rh indicator. Tec3m terminals 2 no connection 4 to pin 9 6 to pin 10 of the towbar plug. This is designed to be fitted on all modern cars with a negative earth. Wiring systems such as can bus were developed in order to be a simpler and more cost effective alternative to the traditional wiring harness. Tow bar wiring relay. Brown wire to rh side light.
Ground wires greenwhite to pin 13 bluewhite to pin 11 white to pin 3. Black wire to lh side light. This is all based on model no teb7as. Feb 01 2011 filed in. Smart bypass relay teb7as 7 way. 12v permanent fused live.
Wiring diagrams many modern cars have multiplexed or can bus wiring systems. Workshop depot sandy lane worksop s80 3ez registered in england wales. Fitted with an audible buzzer and an outlet for a telltale light. There were also a 12v feed an earth and one labeled tt and this was for a lamp to show when the trailer lights were flashing. This 7 way bypass relay may be used on negative earth vehicles of all types from those that just require a simple bypass function for circuit protection or to avoid confusing the bulb failure warning systems to those with part or full multiplexed systems and including modulated outputs appearing. Wiring info as follows.
Again the diagrams say that the white and orange is the side light and the violet and brown is the brake light on the drivers side but again just double check with the test light as i said ford do alter the wiring without updating the diagrams which does make it very hard when fault finding. Grey wire to reverse light. Wiring systems such as can bus were developed in order to be a simpler and more cost effective alternative to the traditional wiring harness. Teb7as 7 way universal bypass relay. 2 pin 2 in the 12s socket grey 6 pin 6 in the 12 socket grey 4 pin 4 in the 12s socket grey high output combination caravan relay with automatic monitoring and switching of supply from car to caravan through double split charge relays. 7 way universal bypass relay teb7as.
Blue wire to fog. Suitable for modern cars with canbus multiplex or other bulb monitoring systems. 886 5967 42 to be used for exports only. Wiring systems such as can bus were developed in order to be a simpler and more cost effective alternative to the traditional wiring harness. 7 way universal bypass relay wiring diagram many modern cars have multiplexed or can bus wiring systems. Red wire to brake light.
Etr02 manufacturers part no.