make sure the remote wire is connected properly on the amp and that it has been connected to the right wire on the iso cable. im going 2 presume you have a largish 40a fuse for example in a holder near the battery. check that its fine. my amp want working because of that fuse. it hadnt broken in the middle, but when held upto light you could see it wasnt straight and therefore wasnt connected at one of the metal ends.