Choosing the right towing electrics
Start with the harness. Most modern vehicles run their lights through a body computer, and splicing a generic kit into the loom can throw fault codes or interfere with functions like trailer stability control. A Brink direct-fit harness plugs into the factory connectors for your exact make and model and is built to work with the vehicle's electronics, so indicators, brake lights and trailer detection all behave the way the manufacturer intended.
Next, pick the socket. A 7-pin flat covers basic trailer lighting, while a 12-pin flat adds extra circuits for things like reverse lights, electric brakes and battery charging, which is why most caravans and camper trailers use them. TAG 12-pin sockets with a built-in reed switch also let the vehicle sense when a trailer is plugged in. Match the socket to your trailer's plug, or keep an adaptor in the glovebox.
If your van or camper carries a house battery, run a separate Anderson plug circuit rather than charging through the trailer plug. TAG's 30 amp and 50 amp Anderson kits use heavy cable with fusing near the battery, which keeps voltage drop down over the length of the vehicle. Remember trailer lighting has to comply with the ADRs, and trailers over 2,000kg GTM need electric brakes, so factor in a brake controller as well.
Towing Electrics & Wiring FAQs
Do I need a vehicle-specific wiring harness?
If your vehicle is a late model with CAN bus electronics, yes, it is the safest option. Direct-fit harnesses like Brink's plug straight into the factory wiring and are designed for your exact model, so you avoid cut wires, fault codes and warranty arguments. Older vehicles with simple wiring can often use a universal kit.
What is the difference between a 7-pin and a 12-pin plug?
Both handle the legally required lighting functions, but a 12-pin adds five extra circuits for accessories such as electric brakes, reverse lights and charging feeds. If you are towing a caravan or camper trailer, a 12-pin is usually the right call. Adaptors are available if your trailer and vehicle do not match.
What is an Anderson plug used for?
An Anderson plug carries high current that a standard trailer plug cannot, most commonly to charge a caravan or camper battery from the vehicle while driving. They are rated by amperage, so a 50 amp kit suits DC to DC charging setups, while 30 amp kits handle lighter loads. The connectors are also keyed so you cannot plug them in the wrong way.