This is the answer to my previous post on how to hook up the rear sub on a 98 mountaineer. This should work on 96-00 explorers and mountaineers with MAch sound.So after studying the diagrams provided i figured a way how to hook up the sub with an aftermarket radio. 1. i first checked to see if the rear amp on pass side located near sub enclosure had power by checking LG/VT(pos) and BLK/LG(neg) for power (12V) i did .so assuming you got power on to the next step.2. locate behind radio a small connector that has four wires BN/OG, RD/BLK, DG/VT, and a solid BLK. 3. cut all wires except BLK off the connector.4. got unused rca cables laying around cut one channel(wire) about 6-8inches long. 5.peel back plastic outer casing on rca cable you just cut. heres how this works the prong that sticks out is the ground(-) and the outer ring part is the Pos(+) split those wires so you get 2 wires on for the ground and one for the pos 6. hook up the BN/OG(+) which is the pos(+) to the POS side of the rca wire. 7. repeat hook up RD/BLK(-) which is ground(-) to the ground side of the rca wire.8. now hook up DG/VT wire to the Blue/white wire (remote/mute)on the back of your aftermarket deck.9. plug rca wire into either red or white channels on the back of after market deck. 10. test it out worked out great for me.. The best way connect wires is to solder them together. but you can use butt-connectors, or even electrical tape for temp use. This is all assuming you have power to the amp and if the amp and sub are in working order. How this helps for no cost. Crutchfield does have a connector to do this its $15
http://www.crutchfield.com/p_120705517/Receiver-Wire-Harness.html?tp=2977 <-------link for connector....The way I explained cost you a rca cable that you may have laying around.and thats $0 extra spent. Contact me if you need more help.