If the battrey is in good order. with the ignition off and doors closed. get a 12v bulb between the battrey earth and earth wire any glow indicates a drain you wil get a small drain from the radio and alarm - clock that normal.Then remove fuses one by one to find your problem.
main probs are alarms,radio and alternator drain interior lights..
note alternator usualy not fused remove wire.
Jeff, March 2006