I'm not sure if I'm talking to the right person for this, but i have a Sony MDX 8900R minidisc car head unit, and a CDX 45 10 disc changer. the head unit works perfectly, and the changer does too - when controlled by my old sony cassette player unit. The bus cable fits both units, but the md head unit won't operate the changer. does anyone know of any kind of converter to fix this problem, or is there any rewiring i can do to either unit to make them compatible? Please, SOMEONE HELP!!

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