1993 Ford Aerostar fuel pump question

Van starts, runs fine til you put in gear. Then it dies.
husband states that he does not hear a sound from the back when he turns on the ignition anylonger either (I believe that is the fuel pump priming)

I would like to ck the fuse first, do you know which one it is? Location? On the fuse panel?

Next I told him it is probably the fuel pump. I have some experience with this. If I remember right it is on the top of the gas tank and to change you need to drop the tank and remove from the top.

Is this a "easy" job to replace fuel pump, or "really difficult"?

He has changed plugs, oil, and ful filter. (Filter was clean, but changed anyway.) Also changed the heater core a year ago.

The question I saw on your list mentioned resetting something also, could you ellabrate a little please?

Also do you have any websites that would show a picture of the assembly of tank and pump so he can get a picture of what he is getting into.

He speaks spanish and I have to translate, it is easier with a picture to show him what needs to be done.

It is not used very often and the last time he moved it it ran just fine.

I have also checked for foul play ie: suger in tank, but do not see anything