Just got our first caravan, however water pump is not working, we have check the pump on the battery and works fine, check there was power getting to the cables inside the caravan and receiving power however even put the wires together. No power getting to the pump, it is a older caravan so water inlet and power are not next to each other, there is no connect on the wires to plug into the space on the back of the van, any help at all would be great