I have a 2014 Venus 380/2 for which I think I have blown a fuse in the 12v system in the caravan due to using a faulty 12v car vacuum cleaner. I have purchased a new 12v cleaner and tested it in the car, so it works. But it doesn't in the caravan. I assume a fuse has blown in the caravan, but I don't know which fuse to change in the consumer unit ? Can anyone help.?