hi im new to motorhomes and just bought a elldis motorhome a 1991.my question is wen i try to poot ma hot water switch on witch is a cascade no lights come on.so i looked at the fuse on the panel witch has lights pump and auxilary and the auxilary one keeps on blowing.i swoped the wires over at the back and the cascade green and yellow lights came on for a second then went out and the fuse blew on the one i poot the wiring on to and woz wondering wot could b making it blow.thanks regards jamie