7 pin 12S plug

[welshti]

Started another topic as i realised the last one was in the wrong forum

I've found a diagram of where the wires should go in the 7 pin 12N + 12S but because both plugs seemed water damaged i've purchased both and awaiting them. When looking inside the 12S plug, this is what i saw with RED [6] and WHITE [3] not connected and a connection from 7 to 3 ?? .. The 12N plug all looked fine with diagram.

7 PIN 12S picture

7 PIN 12N picture

thanks

 

[Dustydog]

Welcome to the Forum Welshti.
See this link .
www.plugwiring.co.uk/how-to-wire-a-7-pin...trailercaravan-plug/

 

[Damian]

Ignore what the current plugs are wired like and follow the diagram for rewiring.

Your old plug has a what was a common, bad, quick trick of linking what should be two separate earth connections.

 

[Dustydog]

It’s worth mentioning pin burn out on the 12s plug and socket. A simple modification is possible. As pin 5 is unused, it is possible to link pin 7 to pin 5 and (provided the brown wire is also earthed in the towing vehicle) share the load between both. Additionally, as pin 2 is now unused (though still probably connected to the split charge relay) the same can be done with the feed by linking pin 6 to pin 2.
The fridge on 12v saps a high current which causes the problem.
Regular attention to the plug and socket will avoid the problem too. Just spread the male pins. Pull out straight rather than ‘wiggling’.