Thanks for the info Basil.
I have just had a towbar fitted to my new Sorento, but when I connected up, I had no indicators and no charge to the battery, at least the volt meter I connected showed no increase in battery voltage when the engine was started. The battery should be quite low as I have used the mover 3 or 4 times without connecting to the mains.i can now put an AVO meter on the 13 pin plug and see what is going on before I take it back.
Steve W