[rohrmann]

Have you checked the auto-reset breaker near the batteries that is inline with the cable that goes to the pump? If that was loaded for a long time, it is possible that it is burned up. You would still have 12 volts going to the solenoid which would still operate, but if that breaker isn't working, you won't have power going to the motor. This is the part you should be checking. It might have a red plastic cover over it to protect the connections.