Originally Posted by
Glenny Boy
If you take the earth wire off the battery and use a multi meter to check for drain between the earth battery post and the earth wire.
Do as above to confirm battery drain, then disconnect all your ancillaries (Stereo, Amps, Alarm, etc..) one at a time and repeat the above test until you find the culprit! Alternatively remove your fuses one at a time and repeat above test again until you find which circuit is draining.