Where exactly are the orifice tubes on a 1998 Ford Windstar with front and rear air conditioning?

On the front unit, the orifice is located in the inlet tube of the evaporator core. Find the line that runs from the condensor to the evap core. Undo that connection, and the orifice is inside the evap core tube right there. On the rear unit. there could be either an expansion valve or an orifice. I am looking at the Ford service manual, and it dosen't say. But either one will be accessed the same way. Remove the left quarter trim, and look at the lines going into the evap core. If there is an expansion valve, you will see it right away on the inlet tube(small diameter tube). If there is an orifice, it will be located inside the inlet tube of the evap core, just like the front unit.  more