V,
I would suggest that you remove the negative battery clamp and hook a 12 volt test light "in line" to confirm that you are pulling voltage from the battery. If the test light is lit without the key switch on then it means you have a current draw. If you see that you have a draw then you can begin to elimenate components by unplugging them to see if the light goes out. Usually you will find the alternator is the problem.
If you are not pulling voltage with the key off then you have another problem. I suggest that you check the voltage at the battery when running. You see about 14.25 volts there.
Steve