If you need to move house, go on holiday with a caravan, get rid of of green waste, or have a hitch is really handy. In this post, we will show you the electrical connection of a trailer hitch of a Mercedes Classe A 3 . In actual fact, even if the set up procedure is not complex, it is necessary to describe some details to consider this task without any problem. Firstly, we will see what the electrical wiring harness of your car hitch involves, then, in a second step, how to make the electrical connection of the hitch of a Mercedes Classe A 3 .
What’s the wiring harness for a Mercedes Classe A 3 hitch trailer?
Why do we have to connect a wiring harness with the hitch trailer of a Mercedes Classe A 3?
So we will start our article by explaining the fundamentals of a wiring harness of a Mercedes Classe A 3. In order to figure out how it works, you must previously figure out its necessity. Whether you have a trailer or a caravan to tow, it is important and earlier all mandatory by the highway code to follow 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 satisfy all the electrical obligations, you will need to install a wiring harness connection on the hitch trailer of your Mercedes Classe A 3 . We will look into this in this article, if you want to learn how to install the hitch of a Mercedes Classe A 3, please see our article on this subject.
What is the electrical connection of the trailer hitch of a Mercedes Classe A 3?
We will now fairly quickly show you 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 Mercedes Classe A 3. There are two different systems of electrical connection for a hitch, here they are:
- The 7-pin electric plug for a Mercedes Classe A 3 trailer, 7 pins : This is the traditional plug that will be found on all Mercedes Classe A 3 hitches. This electrical connection will allow you to transmit all the lighting functions necessary for the rear signalling of your trailer, you will discover 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 Mercedes Classe A 3: This plug system is principally used for caravans that require 12 volts inside to supply the various electrical gear in the cabin. This sort of connection needs 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 Mercedes Classe A 3?
To conclude this article, we will fairly quickly show you you how to produce the connection of the wiring harness of your Mercedes Classe A 3 .
How to make the connection of the wiring harness of an old Mercedes Classe A 3?
To install the wiring harness of an old Mercedes Classe A 3, you will have to go and get all the necessary cables in the rear lights of this one. We advise you to call in a car electrician for this intervention because it is complex, but we will nevertheless summarize the main steps to be carried out:
- Take out the trunk lining from your Mercedes Classe A 3 to access the rear light unit.
- Find 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 Mercedes Classe A 3?
For new Mercedes Classe A 3s, the wiring harness is much simpler to connect:
- You can use a multiplexable box, you will discover specific ones for your Mercedes Classe A 3 and universal models. It’s up to you to select according to your budget, know that a universal version costs between 30 and 60 euros.
- Take out the trunk lining from your Mercedes Classe A 3 so that you can route the cables from your box to the front of your Mercedes Classe A 3 and connect them to your fuse box.
- Install the case in the trunk effectively.
- You don’t have to retrieve your cables from the trunk and connect them to your outlet.
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How do you hook up the power to a trailer on Mercedes Classe A 3?
Finally, to conclude this article we will fairly quickly show you you how to produce the electrical connection of a caravan on your Mercedes Classe A 3 . To get this done you will inevitably have to go through one of the previous steps, it’s up to you to select the one that points your model and your budget. After you have conducted 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 need more guides on the Mercedes Classe A 3, go to our Mercedes Classe A 3 category.
