Car: 1996 Contour GL...4cyc....automatic

1) Which fuses do I pull in the power distribution box to
reset the PCM? ( will disconnecting the battery do the
same thing?)

2) (Bonehead question)...never understood the o/d button
on my shifter. One guy said...45mph and under...push
button on..(meaning green light on dash says o/d off)
and 45mph or faster...push o/d button off..no green
light on dash. (yes, i am confused)

3) Auto. transmission in 96 contour...computer controlled?
Location of main tranny sensor in power dist. box or
controlled by the PCM.

Thanks. Have a good one.