Why do some tow bars have 2 sockets?
Single – With single electrics, your car is wired so that it will only power the lights of your caravan. Twin – Twin electrics use two 7 pin sockets, and wire your car to power the towed vehicle/caravan road lights, reverse lights, and any interior electrics in the caravan such as the fridge and leisure battery.
Why do I need a bypass relay for towbar?
A bypass relay is necessary if you are fitting a universal wiring system in a modern car, as they work differently from older vehicles. To protect your vehicle’s electrical system from damage, we would always recommend having vehicle specific towbar electrics fitted by a professional.
What’s the difference between 7 and 13 pin towbar?
The difference between a 7-pin and 13-pin plug is that a 13-pin plug has more functions. A 7-pin plug only supplies in basic lighting, such as blinkers and brake lights. The additional pins in the 13-pin plug are used for the reversing lights and the rear mist light, among other things.
How does a 7-way bypass relay work?
The 7-way bypass is a miniature bank of 7 of these electrically operated switches. When fitted it has a main 12 volt power supply into the 7-way unit, and 7 output wires leading to the towbar’s electric socket. Also into the relay are 7 “switching” wires which connect to the vehicle’s lighting circuits.
Can you plug a 7 pin plug into a 13 pin socket?
If you have 7 pin electrics fitted on your car: It can also be used to plug in a caravan which has a 13 pin plug. It is important to remember that the adapter will only extend the 7 pin functions, for example it will provide power the for the normal road lights.
Are towbar drop plates legal?
It is rare for manufacturers to allow for a tolerance on the vertical position of the towball, unless the towbar is one with a height adjustable facility built in. As such, it is usually illegal to fit a drop plate to a Type Approved towbar. There are a handful of exceptions to this, generally 4×4 vehicles.
How do you wire a bypass relay?
Install the fuseholder as close to the battery (or fusebox power take-off point) as possible. Do not insert the fuse yet. 5) To a suitable earth point on the metal vehicle body take the following wires: White from Black 7-core cable. White from Bypass relay….How to Fit a Multiplex Bypass Relay.
| Relay Wire | Connect to: (on vehicle) |
|---|---|
| Grey* | Reverse Light* |
What socket do I need for a towbar?
Single 7 Pin Electric sockets and electrics also known as 12 (N), are fitted as standard with any towbar. Whether you are towing a caravan,a trailer or using the tow bar for a cycle carrier we recommend you will need a single 7 pin socket.
How many types of towing electric sockets are there?
There are 3 types of towing electric socket used in the UK. These are Single 7 Pin electrics (12N), Twin 7 Pin electrics (12N & 12S) and Single 13 Pin electrics.
Do you need an electric plug for a towbar?
No matter what size electric plugs you have on your towbar, caravan, bike rack or trailer, a towbar electrics adapter will enable you to safely connect your car and whatever you are towing without the need to change the electrical plugs. What towbar electrics do I need?
What does a 7 pin towbar plug do?
7 pin electrics provide the normal or legal lighting requirements for towing. A 7 pin towbar plug will provide brake, indicate and tail light functions on your bike rack, trailer or caravan and is suitable for simple towing.