ok, for anyone wanting to do the factory tow plug, this what ive ascertained from the factory wiring loom i got out of a 2015.
Firstly, 2014-2017 no need to get any sort of flashing of the ecu, just splice into
the wiring .
The pins on the plug are numbered 1,6,5,3,2,7,4
Pins 1,6 and 7 are spliced into a wiring loom behind trim rear boot passenger side.
The loom is largish and has a large grey joiner plug on it.
plug Pin 1- yellow wire spliced into loom to white/ green wire
Pin 6- red wire spliced into loom to white/brown wire
Pin 5 - blue wire- not connected (brake control ?)
Pin 3- white wire (thicker) to earth body
Pin 2- Black wire - appeared to be not connected
Pin 7- Brown wire- spliced into loom to white/ grey wire
Pin 4- Green wire- spliced into white/ yellow wire ,drivers rear tail light
(white plug)
Hope this may help some one doing their own trailer plug wiring.
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