Hello Gonzo Kid,
As ever with questions like yours, where we cannot see touch or test the relevant parts its very difficult to establish what the problem is.
But as Ray has suggested if other 12applianceses are working, then its almost certainly one of a few possibilities. You say you have checked the fuse, then ist most likely a bad connection, but without being able test its almost impossible to know exactly where to look.
In such cases it really needs someone who knows how to trace the fault and resolve it to actually be there.