I have a 998c HDSI on the bow and a 999c HDSI at the cockpit. The bow unit is mounted securely in a RAM mount but I have noticed it will lose power if we hit a few bumps. These were wired by a previous owner and i've noticed that at the cockpit one of the wires to the power plug is cut completely? This unit works fine. The bow unit has both connected. One has to be incorrect? Could this be the cause of constantly losing power?