Regardless of you need to move house, go on vacation with a caravan, dispose of green waste, or have a hitch is pretty handy. In this post, we will describe the electrical connection of a trailer hitch of a BMW i3 . Indeed, regardless if the set up process is not complex, it is required to clarify some details to consider this work without any problem. Firstly, we will find out what the electrical wiring harness of your car hitch consists of, then, in a second step, how to make the electrical connection of the hitch of a BMW i3 .

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What’s the wiring harness for a BMW i3 hitch trailer?

Why do we have to connect a wiring harness with the hitch trailer of a BMW i3?

So we will commence our article by explaining the fundamentals of a wiring harness of a BMW i3. In order to figure out how it works, you must previously figure out its necessity. If you have a trailer or a caravan to tow, it is fundamental and earlier all mandatory by the highway code to respect certain rules, 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 meet all the electrical regulations, you will need to install a wiring harness connection on the hitch trailer of your BMW i3 . We will look into this in this post, if you want to discover how to install the hitch of a BMW i3, please find out our article on this topic.

What is the electrical connection of the trailer hitch of a BMW i3?

We will now fairly quickly describe how the electrical connection of your hitch works. The connection uses the 12-volt current from your car to power the hitch lights on your BMW i3. There are two different systems of electrical connection for a hitch, here they are:

  • The 7-pin electric plug for a BMW i3 trailer, 7 pins : This is the traditional plug that will be located on all BMW i3 hitches. This electrical connection will allow you to transmit all the lighting functions needed for the rear signalling of your trailer, you will locate a plug for each action (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 i3: This plug system is mainly used for caravans that require 12 volts inside to supply the various electrical gear in the cabin. This type of connection requires 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 motor vehicle is switched on).

How do I hook up the wiring harness of a BMW i3?

To end this article, we will fairly quickly describe you how to make the connection of the wiring harness of your BMW i3 .

How to make the connection of the wiring harness of an old BMW i3?

To mount the wiring harness of an old BMW i3, you will have to go and get all the required cables in the rear lights of this one. We recommend you to call in a car electrician for this intervention because it is complex, but we will nevertheless summarize the main steps to be accomplished:

  • Remove the trunk lining from your BMW i3 to access the rear light unit.
  • Locate 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 i3?

For new BMW i3s, the wiring harness is much simpler to connect:

  • You can use a multiplexable box, you will locate particular ones for your BMW i3 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 i3 so that you can route the cables from your box to the front of your BMW i3 and connect them to your fuse box.
  • Install the circumstance in the trunk effectively.
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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 i3?

Finally, to end this article we will fairly quickly describe you how to make the electrical connection of a caravan on your BMW i3 . To achieve this 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 wish more tutorials on the BMW i3, go to our BMW i3 category.