I have had 2 Fusion systems neither one worked.
I modified the Receiver. The Antenna was horizontal polarity and the transmitter is vertical polarity. This is half the power of being the same polarity, or signal strength. The antenna is a dipole. I disassembled the monitor undoing the 4 screws, being careful. Unscrewed the 6 screws for the back panel mounting of the circuit board, be careful with the flex circuit. The antenna is loose now, I drilled a hole in the back top of the case, used 2 sizes of heat shrink and got the antenna and stub outside the case. Reassembled.
I have full bars of signal strength now, had none before. Will know towing Thursday.