13 wire Trailer connector - Vito 2011

Orchid70

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Your Mercedes
A180 W169 2005
Hi
I only have one side turn signal and other side position light working. There is earth on both earth wires, numbers 13 and 3 and there is 12V to the number 9.
The trailer had burned earth connector (7 wired with adaptor) and both car and trailer hade awfull connectors and broken wires.
Is it possible that the Traile Recognition Control Unit has broken?
I cant see any broken wires in the back of the car - but the wires go into the car body where the rear right lights are seated. I havent opened the panel yet, where I suspect the control unit to be. Or is there one??
Would it be easier to buy a bypass relay and connect stright to the lamp wires on each side?
ANy ideas where the problem could lie?
 
OP
O

Orchid70

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Your Mercedes
A180 W169 2005
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So:
Theres is contonuity between AAG (trailer sensor/relay) and trailer connector - on all wires.
When I operate the different lamps from my computer (Delphi OBD2 reader) - they all work.
But not when I operate from the car.
Not sure if its the AAG, trailer electronic controller (number A1695455632), thats burned or something in the CANbus. The electronics looked OK when I opened it. Both fuses are OK.
So I have got a 7 pin trailer connector and a realy kit for it.
 


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