Saturn Repair: Saturn SC2 battery going dead while car off, saturn sc2, 93 saturn sc2

Question
'93 Saturn SC2 4 cyl. manual transmission
Intermittent problem.  Battery goes dead with car off. Sometimes while car is running - then turn car off and battery is dead.  Something is draining the battery while car is off.  Battery & alternator replaced.  Saturn dealership ran diagnostics - could not reproduce problem. Really need help in solving this problem.

Answer
Hi well not a loti can do but we will try  a few little things ....do u use your rear defrost? after market radio? fog lights?dors not closing all the way? just a few things people over look, light under the hood does it go off when hood closes? also defective alternater the alt may discharge with the key off if the diode bridge is bad seen it 3 times.cant find the problem until it happens. so the car stalls if it is running?