Removed both radios with DIN tools. '01 SuperDuty has am-fm - cassette - cd and only one plug into the back of the radio.

The MACH radio has 3 plugs and the wiring harness. I have remover the subwoofer from the '98 Explorer and I know the small plug on the Explorer controls the sub-woofer. BUT!!!! What I can't figure out is what the third plugin on the Explorer wiring harness controls.

By the way... the OEM '01 SuperDuty radio works fine in the '98 Explorer.

The sub-woofer out of the '98 Explorer has it's own separate amp.

How do I go about wiring the MACH radio into the '01 SuperDuty and having it work properly. What is the wattage of the MACH versus the OEM regular '01 am-fm-cassette-cd? I know that I will have to change speakers.

Where is a wiring diagram to be found? The ford part number of the MACH radio is F87F-18C868-AD. I have Chiltons and Haynes and neither shows radio wiring diagrams. HELP!!!