ive got a problem my battery keeps goin flat and ive got humming when stereo is on i know loads about the stereo side but this is doin my head in tbh now !!!!!

 

best thing to do is a drop test disconect ya live lead from your battery and connect your multi metter between the cable and the battery terminal (dont try and start it it will melt ya multi metter) make sure your ignition is switched off it will display a reading ,then start pulling fuses and keep an eye on the display soon as it drops down note the fuse you pulled when it dropped and that will give you an indication of wat circuit the fault lies on

 

Tracker fitted ?