"K", I'm still looking for the diagram for the Phase 2 to World plug adapter. Here is two diagrams that will get you started on making the adapter. The first one is for the Metra
71-5520-1 which fits the back of your newer radio. The second one is to a link that has an PDF drawing of the wiring for your Mach type sound system in your Explorer.
http://www.fordforumsonline.com/for...-audio-schematics-98-2001-machsoundschem]-pdf
http://www.sonicelectronix.com/pdf/metra/met-7155201.pdf
Start with the main phase 2 connector (24 pin) and the world plug (16 pin). Most of the wires are solid color and some have an solid color plus a stripe. There are 13 wires on the World plug that will go color for color to the exact match on the Phase 2 plug. The only exceptions will be that some black wires with stripes will be connected together for a common ground lead.
Yellow to yellow
Red to red
Orange /white stripe to orange /white stripe
Orange/black stripe to orange/ black stripe
White to white
Green to green
Purple to purple
purple/black stripe to purple/black stripe
gray to gray
gray/black stripe to gray/ black stripe
White/black stripe to white/black stripe
green/black stripe to green/black stripe
purple/black stripe to purple/black stripe
Now there are two black wires left on the world plug (black and a black white) that must be wired together. Twist them together. On the phase 2 plug there will be three black colored wires that must be twisted together. They are the following colors:
black/ striped green, black / striped gray and just solid color black. Twist the group of black wires from the phase 2 connector together to the group from the world connector. These are simply just common ground wires that are electrically connected together. If you have followed correctly the instructions given you can connect this one main harness to test the main speakers and radio faceplate controls. This one harness will not give you the rear sub woofer, nor rear radio control buttons or steering wheel controls. I have to find the diagram or redraw it from my adapter if need be. This should be enough to wet your whistle for now and reasonably test your progress until I get the complete diagram.