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Volkswagen Golf Mk7 Service & Repair Manual: Trailer socket

The Volkswagen Golf Mk7 trailer socket must be connected to the towing vehicle's electrical system per the manufacturer's instructions — this page requires observing the current flow diagrams during installation.

The trailer socket must be connected in accordance with the manufacturer's instructions to the electrical system of the pulling vehicle.
When installing, observe the relevant current flow diagrams and the installation instructions from the manufacturer of the towing device.
   
»7-pin« trailer socket
If more than the recommended number of electrical consumers is to be connected in a system with a »7-pin« socket, a second »7-pin« socket must be installed. Assignment of the pins should be carried out in accordance with DIN ISO 1724 as follows:
1 - Left turn signal
2 - Rear fog light
3 - Earth
4 - Right turn signal
5 - Driving light, marker light, right number plate light
6 - Brake light
7 - Driving light, marker light, left number plate light
   
»13-pin« trailer socket
Reversing lights, »permanent current« and charge lead on the trailer can be used via the »13-pin« trailer socket. If a bike trailer or a caravan is to be towed, for example, it is recommended that a »13-pin« trailer socket is always used.
   
Assignment of the pins should then be carried out in accordance with DIN ISO 11446 as follows:
1 - Left turn signal
2 - Rear fog light
3 - Earth for current circuit 1 to 8
4 - Right turn signal
5 - Right driving light
6 - Brake light
7 - Left driving light
8 - Reversing light
9 - Terminal 30 (permanent positive)
10 - Terminal 15 (charge battery in trailer)
11 - Not assigned
12 - Not assigned
13 - Earth for terminal 15/30
 

13-pin« trailer socket

    Questions & answers

    Trailer socket — Volkswagen Golf Mk7

    What trailer socket does the Golf Mk7 use?
    A 13-pin socket providing all lighting, charging and trailer detection functions. The wiring integrates with the vehicle's CAN bus via the trailer detector -J345-.
    Factory fitted towing attachment
    If the vehicle was supplied with a factory fitted towing attachment, everything with regards to the technical and legal requirements has already been taken care of. ...

    Trailer detector control unit -J345-
    General description: The trailer detector control unit -J345- detects a power consumption of at least 5 W → Remark when “towi ...