Dead Battery 99 ML430

[rodmay]

Unable To Get Battery To Hold A Charge!

Issue Started A Couple Of Weeks Ago Shortly After Repairing The Drivers Side Window Switch. (related ???) The 3 Yr Old (aprox 25k Miles) Interstate Battery Was Completly Dead Several Days Afterwards. Proceeded With A 24hr 2amp Trickle Charge.... Battery Would Not Hold A Charge And Did Test Bad. Replaced The Battery With Similar Aftermarket. (same Specs..autocraft) That Battery Lasted No More Than Two Days Before It Went Dead And Also Tested Bad Upon Its Return. I Am Now On The 2nd Brand New Battery And Now, It Too Is Failing. The Current Battery Is Testing Good W/12 Amp Between The Posts. The New Battery Will Also Hold A Charge But When The Vehicle Sits Over Night, It's Dead The Next M0rning. Correct Me If I'm Wrong.... But A Component Somewhere Is Drainning The Battery. Fyi, I Have Pulled The Window Switch And Radio Fuses, Let Sit Overnight, Still No Battery. Oh, The Alternator Is Also Testing Good At About 13. (radio Is Factory)

Sorry For The Cheap Novel But Thought I Should Start From The Beginning.

Any And All Relivent Troubleshooting Help Would Be Greatly Appreciated....