Your Midwest does charge both battery banks from the Diesel engine. IF NOT, then there is either a fuse blown or the charge solenoid is bad. You can call Midwest, but they do not give 2nd owners any warranty help. AS to your problem, if you do not have anybody in your area experianced on Midwest products you need to call Midwest and ask for the closest Midwest authorized center. The way Midwest installs and wires their Motorhomes can be very difficult for someone that does not work on them regularly. Doug
