Tried starting the engine yesterday and the starter clicked a couple of times which it has done before, then the engine strted to turn over, but when i released the ignition key the starter was still running, could not get it to stop turning over other than turning the battery isolater switch, went back today and turned the isolater switch and it was still turning so i fiddled with the ignition key but was not helping, i then disconnected the three wires from the ignition switch but was still turning the engine over.....any ideas ???