Get a cheap test light that uses a 12 volt bulb.Disconnect neg cable.Install light bettween cable and post.Should not be lite.Might have a real dim light if there are accessorys that you have.Make sure all items are off and doors closed.If its lite start pulling fuses.Easy way to test draw.If you have volt meter start and test to check alt output.Should be over 13 volts running at say 2ooo RPM.Rocky