Does anyone have a wireing diagram for the six pin ps/2 plug and wire harness for fitting in the Trailer. I already have the Tractor wireing harness that connects into the MFC unit / socket that receives the round ps/2 plug. I know that this trailer harness has some sort of link across the red stop led's and wonder if this is a resistor or diode. Also details of pin connections if possible. The reason why I want these details is that I am about to start building the Fuel tanker trailer kit and the wiring kit is not available from any UK stockists at present and will not be available until much later this year. I have all the Led's wire and plug so might as well make my own harness up.