Connected up to the mains to top up the battery before going away next weekend and found after charging for the day that it was not registering anything on the voltmeter after the mains was disconnected. Have put the battery on charge indoors on a charger whilst I check out what might be wrong. Leads at battery box end are secure in the batter connector clips. Difficult to identify what wires are what inside the caravan but the blade fuse for "Battery + " seems to have gone. As the handbook is very sparse on information on the 12V circuits I am not sure exactly where in the circuitry the fuse sits but assume it is the cause of the problem. Is their anyone that possesses more detail on Senator Series 5 12 V Electrics as I am not confident that the one blown fuse would be preventing 12V to everything in the caravan.
Alun
Alun