Electrical and Audio are two fields I know nothing about. I have a 1991 Explorer XLT and my father has a 1993 Explorer XLT. My fathers has the factory CD Player from 1993, and mine has a factory Cassette from 1991, however from what I have seen, Ford may have only used my Cassette deck in 1991. It has the funky rocker volume knob on it. Will the 1993 factory CD swap easily with the 1991 factory Cassette without a major wiring modification? Help would be appreciated.