Sorry if this question has been asked a million times. Bought used boat, worked fine. Previous owner had revoed tilt/trim and installed after market unit, works fine. Also had many accesories, which were revoved. I'n trying to clean up all the old wiring. Tried to be careful, but lost a ground or some thin because motor will not start from remote control key - no joy. There is one red lead into the remote control. Thought it should be hot, but not so. What's next to check? Thanks, stripers are running and I need to get out there.