Bailey Unicorn unknown part

It’s very difficult to make suggestions without seeing photos but 13P suggests 13 pin to my simple mind. 

Download a free resizing app such as Image Size from either Apple or Google app stores and you can then easily resize your pics.

By George I think I may have done it

Well done!

I'm not certain but I think it might be the re-alignment tool for resetting the 13 pins in your towing socket in the event of them going out of line. It 'parks' the pins in the right position.

Perhaps someone else can confirm.

As TW says, it is to align the inner and outer parts of a 13 pin plug so that it will fit into the socket and the turn clockwise to “lock”.

Mine lives in the door pocket so it’s readily available-this seems to stop the problem happening!

If as happens,  the 13pin plug goes out of line the green "tool" will realign the plug to enable insersion into the socket, very valuable  pieces of kit

They also come in blue. 

On our recent holiday a couple had to be taken home by the AA.  All the various 13pin plugs and adapters on the AA tow truck were out of alignment, so I assisted with the blue tool.

Well, that's marvellous fellow members. I would never have guessed in a hundred years what this was. Thank you very much for all of your help.

With your assistance I found out where to look in my caravan handbook. There on page 21 is a paragraph which states "Within your accessories pack you will find a green 13 pin plug protection screw on cap. This should be used every time you connect your caravan to your vehicle. This will help to protect the 13 connections from corrosion. If you find corrosion on your connections spray with water displacement spray".

So, it turns out that this is not an alignment tool but an anti corrosion cap for your caravan plug. I think the instruction manual is wrong in that it states you should use the cap every time you CONNECT your caravan to your vehicle. This would in fact be an impossible task. I think the manual should read "every time you DISCONNECT your caravan from your vehicle".

As can be seen from the photographs the green cap has three pips on the inside which correlate with the three grooves on the outside of the caravan plug. Simply place the cap over the plug and twist for a waterproof seal.

I do not have an alignment tool supplied with the caravan. I must purchase it separately from my dealer.

I did say I could be wrong......

Any chance the tool is dual purpose?