Regardless of you need to move house, go on holiday with a caravan, dispose of green waste, or have a hitch is fairly handy. In this post, we will show you the electrical connection of a trailer hitch of a Mercedes A class . In actual fact, even if the set up process is not difficult, it is required to describe some points to consider this intervention without any problem. Firstly, we will see 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 Mercedes A class .
What’s the wiring harness for a Mercedes A class hitch trailer?
Why do we have to connect a wiring harness with the hitch trailer of a Mercedes A class?
So we will begin our content by detailing the principles of a wiring harness of a Mercedes A class. In order to discover how it works, you must already discover its necessity. Whether you have a trailer or a caravan to tow, it is necessary and above all mandatory by the highway code to respect certain laws, 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 Mercedes A class . We will look into this in this article, if you want to learn how to install the hitch of a Mercedes A class, please see our content on this theme.
What is the electrical connection of the trailer hitch of a Mercedes A class?
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 Mercedes A class. There are two different systems of electrical connection for a hitch, here they are:
- The 7-pin electric plug for a Mercedes A class trailer, 7 pins : This is the classic plug that will be discovered on all Mercedes A class hitches. This electrical connection will allow you to transmit all the lighting functions needed 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 Mercedes A class: This plug system is specifically used for caravans that involve 12 volts inside to supply the different electrical equipment in the cabin. This type 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 Mercedes A class?
To conclude this content, we will quickly show you you how to make the connection of the wiring harness of your Mercedes A class .
How to make the connection of the wiring harness of an old Mercedes A class?
To mount the wiring harness of an old Mercedes A class, 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 motor vehicle electrician to do this intervention because it is difficult, but we will nevertheless summarize the most important steps to be accomplished:
- Remove the trunk lining from your Mercedes A class 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 A class?
For recent Mercedes A classs, the wiring harness is much easier to connect:
- You can use a multiplexable box, you will find particular ones for your Mercedes A class 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 Mercedes A class so that you can route the cables from your box to the front of your Mercedes A class 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 A class?
Finally, to conclude this content we will quickly show you you how to make the electrical connection of a caravan on your Mercedes A class . 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 corresponds to 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.
To find more tips on the Mercedes A class, take a look at the Mercedes A class category.
