IMO trouble shooting a parasitic by starting out pulling the 40 amp PCM fuse is not very useful. The only way this is useful is IF this the ONLY fuse that has any effect on the draw. IMO it's far more useful to narrow down WHICH feeder fuses also reduce the draw.
OBTW, I have helped several people with parasitic draws that turned out to be a bad electric seat switch.
BUT for the 2001 model year the radio fuses are listed in the Ford service manual as F2.6, F2.27, and F2.32.
For the 2002 model year the radio fuses are listed as F1,15 and F1.13 from the BJB and F2.9, F2.27, F2.6, and F2.32.(CJB).
Since the odds favor the radio as the cause, focus should start there.