Well if it is not in the passengers side then is it in the drivers side ? If so I may have found my issue as the window seal seems to leak abit when it rains on the floor of the drivers side so if the audio gateway is the drivers side that may of corrode or damaged the wiring but if not I'm back to square 1 no idea lol as all fuses front back and near the steering wheel seem fine.Mine's FL (FaceLift), so I didn't have anything in the passenger foot well.. But have a look anyway.
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Well I'm sure it was suppose to be passengers side but if it is the drivers side I may have found what is causing my problem do you know if on uk models it is in the drivers side ? As if so I may have found the issue as my window screen seal leaks the tiniest bit in heavy rain as I realised the other day and drips on the floor drivers side I noticed but if it's not that side I'm back to square one and have absolute no idea what would be causing this voltage drop ...