all it took was a 10 amp fuse. I'd contacted MBZ-USA's website tech support and asked if it could be a fuse. They steered me clear of that notion and told me to check 'lead # so-and-so' for power, and if there was none, to trace out the wiring. This after I asked if it could be a fuse!!! (they said "no way!" That's how I started the conversation!! How grateful I am for the energy and info you people spread around via this site!!!