This is the latest generation bypass relay directly from the manufacturer
Bypass relays are used in conjunction with a 12N (black) towing socket for trailer or caravan road lighting. These bypass relays are universal and can be used with modern vehicles to protect the on-board electronics and prevent false bulb failure warnings from popping up on the dash when using your towing socket.
The relays are used with vehicles that incorporate basic or full multiplexing / can-bus electronics, as found in most modern vehicles. Due to the additional load placed on the electrical system when a towing socket is used, the vehicle can react in ways from a basic bulb failure false alarm to on-board electronics failure.
This UK manufactured bypass relay will prevent that.
Suitable for vehicles with 12v system voltage