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7 Pin Trailer Plugs Sockets

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7 Pin Trailer Tow Bar Plugs and Sockets

7 Pin trailer tow bar plugs and sockets to suit round and square trailer plugs. As a result of failing and broken brass screws, all trailer plugs are manufactured with stainless steel screws.

Use the drop-down to select electrical trailer parts and tow bar connectors.

Select from the following 7 Pin tow bar Plugs and Sockets

  • Flat Socket - 7 pin
  • Flat Plug - 7 Pin
  • Round Socket - 7 pin
  • Universal angle bracket to suit round and flat sockets.

Purchas more plugs and sockets below

Plug Wiring Diagram

trailer plug wiring diagram

What is the difference between trailer connectors?

  • A socket is attached to the tow bar.
  • A trailer plug is attached to the trailer.

Poor connections cause bad connections. A handy tip is to spray the male plug terminals with WD40. This is a temporary fix to overcome corrosion problems.

Solder the cable ends before connecting to the terminal ferrules. Solder all joints and tape with electrical tape or heat shrink.

Soldered joints last forever. Unsoldered joints will give problems when the twisted joints oxidise. Electric current will not pass through corroded or hot connections and will cause a fire.

Hot Joints in Caravan Electrical Connections and Fire

Quite often installing new lights causes the tow vehicle to flicker. Flickering is a serious problem as the onboard computer will be reporting the problem to your dash.

ECU Towbar Loom ConnectorInstalling an ECU to bypass the vehicle computer fixes flickering indicator light problems. Purchase ECUs here

The onboard computer is measuring resistance, wattage and voltage drop to the newly installed lamps. It is quite likely the new lamp and cabling resistances fall outside the computer specifications.

The best remedy that is used by many tow bar installers, is to install a new ECU (electronic control unit) to control the LED light kit.

Finally, in 100% of cases, installing the ECU fixes problems with the vehicle's flickering lights.

Additional information

Weight0.1 kg
Dimensions2 × 8 × 8 cm
Select Plug or Socket

7 Pin Flat Plug, 7 Pin Flat Socket, 7 Pin Round Socket, Universal Bracket