still need help , cant figure it out

04 DODGE ram hemi, i pluged my boat in this mornin and the tail running lights did not work, but the brake and blinkers work. i unpluged the boat, and now the trucks tail running lights and front side lamps dont work now, but blinkers flashers and brakes work. i dont have the lamp out signal, and checked all fuses on the diagram in the service manual, all good and checked the relay switch with one out of a good truck, same model and still did not work. so all fuses and the relay is good, and i have no tail running lights, or front side lamps when the lights are on, just high and low beams. im dumb founded......i cant figure it out. i googled it and all i found was that the guy replaced the entire fuse box cause the dealer said there was a bad wire and it had to be replaced. please help