Jeep Grand Cherokee electrical issues

jeepman64

The problem I have is it acts like its totally dead , ive tightend down the cables looked over the ground wire . Could it possibly be the starter or selonoid . I recently had too fix some wiring between the drivers door and door jam , 2 wires broke . Just today it acted up , turned the key and nothing happened , I heard a humming noise and the guages started to move and then I tried to start it again and it did , but very slow . Please help , I dont want to get rid of my jeep.