Hi Ken. i have just used a fluke and then gone through each of the 13 pins on the towing socket and i am getting no voltage so it cant be the caravan as it is not getting any power. i have changed the 3 fuses according to the handbook and still no power. i have checked the ommhs of the fuses and they are good. looking at things i have googled, there might be a 7 pin relay with an inline fuse fitted, so i am gonna have to trace that. im not very electrical minded so running out of things i can try before having to go to the garage. i changed fuses on car and caravan hoping it would be something simple...