99 D dead battery overnight

my battery keeps going dead overnight what ive done so far-
had battery checked -fine
starter -fine
alternator-bad rectifier
before buying a new alternator i left it and the starter out overnight and battery still went dead ok so i tried to do an ignition off draw test but keep blowing the fuse on my multimeter (rated for 400ma)anyone have ant tips on where to look next?

well did some more checking and got lucky found that the rear wiper motor (which hasnt worked for like a month) is trying to put itself into park position or so it sounds does anyone know what fuse the rear wiper motor is on so i can pull it until i get time to look at the motor? the book and the fuse panel door do not say