My 205 also stopped working but it coincides with the replacement of one of my amps. I ha e found a random black wire over by my amp that isnt hooked to anything. Tracing it back to the harness, it goes into a butt connector and turns to yellow black. It was pushed back behind the amp panel so no clue what it goes to. Not sure if the 2 are relatedn but usually the problem starts with whatever you touched last. In my case since mine wont even power on Im curious if this wire has something to do with the amp system. Is there a place to get a wiring diagram for these boats?