A glovebox or trunk light staying on is one common fault
You can put a DC ammeter in series with the battery with everything off
and expect about 18-20 DCMA That powers the CPU and the Clock
If you see higher current, you can pull fuses and hope the culprit is on a fused circuit, You'll see the current fall to a low value when you pull the right fuse.
That should lead you to the problem.
Warning: don't run the windows etc, most multimeters top out at 10Amps
and if you run a window motor you'll blow a meter fuse.
Good Luck, Bill
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