Whether you need to move house, go on holiday with a caravan, get rid of of green waste, or have a hitch is really handy. On this page, we will show you the electrical connection of a trailer hitch of a BMW X4 . In actual fact, regardless if the installation procedure is not complex, it is necessary to explain some details to consider this work without any problem. Firstly, we will discover what the electrical wiring harness of your motor vehicle hitch contains, then, in a second step, how to make the electrical connection of the hitch of a BMW X4 .

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What’s the wiring harness for a BMW X4 hitch trailer?

Why do we have to connect a wiring harness with the hitch trailer of a BMW X4?

So we will start our article by explaining the principles of a wiring harness of a BMW X4. In order to figure out how it works, you must already figure out its necessity. Whether you have a trailer or a caravan to tow, it is essential and earlier all mandatory by the highway code to respect certain requirements, here they are:

  • A solid chassis for the trailer…
  • Wheels that fit.
  • An electrical connection.
  • A license plate in plain sight.
  • A stoplight repeater.
  • A traffic light repeater.
  • A blinker repeater.
  • License plate illumination.
  • A fog light repeater.

In order to fulfill all the electrical requirements, you will need to install a wiring harness connection on the hitch trailer of your BMW X4 . We will look into this in this post, if you want to learn how to install the hitch of a BMW X4, please discover our article on this subject.

What is the electrical connection of the trailer hitch of a BMW X4?

We will now quickly show you how the electrical connection of your hitch works. The connection uses the 12-volt current from your motor vehicle to power the hitch lights on your BMW X4. There are two different systems of electrical connection for a hitch, here they are:

  • The 7-pin electric plug for a BMW X4 trailer, 7 pins : This is the traditional plug that will be discovered on all BMW X4 hitches. This electrical connection will allow you to transmit all the lighting functions required for the rear signalling of your trailer, you will find a plug for each objective (left and right indicators, ground, fog light, left and right position light, left and right brake light).
  • Electrical connection for caravan with 13-pin plug for BMW X4: This plug system is specifically used for caravans that involve 12 volts inside to supply the various electrical devices in the cabin. This kind of connection necessitates the use of an adapter. The extra pins will bring the 12 volt power permanently (to recharge a battery in the caravan) and the 12 volt power in use (to use the 12 volt equipment when the car is switched on).

How do I hook up the wiring harness of a BMW X4?

To finish this article, we will quickly show you you how to make the connection of the wiring harness of your BMW X4 .

How to make the connection of the wiring harness of an old BMW X4?

To install the wiring harness of an old BMW X4, you will have to go and get all the necessary cables in the rear lights of this one. We suggest you to call in a motor vehicle electrician to do this intervention because it is complex, but we will nevertheless summarize the most important steps to be carried out:

  • Remove the trunk lining from your BMW X4 to access the rear light unit.
  • Identify the wires that correspond to each of the taillight functions.
  • Connect them to the lugs on the wiring harness on your hitch.
  • Close the whole thing down.

How do you connect the wiring harness of a recent BMW X4?

For new BMW X4s, the wiring harness is much simpler to connect:

  • You can use a multiplexable box, you will find specific ones for your BMW X4 and universal models. It’s up to you to choose according to your budget, know that a universal version costs between 30 and 60 euros.
  • Remove the trunk lining from your BMW X4 so that you can route the cables from your box to the front of your BMW X4 and connect them to your fuse box.
  • Install the circumstance in the trunk properly.

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  • You don’t have to retrieve your cables from the trunk and connect them to your outlet.

How do you hook up the power to a trailer on BMW X4?

Finally, to finish this article we will quickly show you you how to make the electrical connection of a caravan on your BMW X4 . To get this done you will automatically have to go through one of the previous steps, it’s up to you to choose the one that means your model and your budget. After you have done this, the last step will be to buy an adapter that goes from a 7-pin plug to a 13-pin plug so that you can benefit from the 12 volt current in your caravan. These adapters come at different prices, you will need to count between 15 and 40 euros. All you have to do is plug it into your 7-pin plug.

If you have any additional questions about the BMW X4, do not hesitate to consult our BMW X4 category.