Heh heh.. Yes, agreed. I wasn't trying to oversimplify, just that if I could find the pinout I'd have a clue wether it would be worth attempting.

I did find this:

http://www.pie.net/aux_appl_chry.htm#jeep

which seems to be exactly what I want. Now just to find a dealer that sells it...
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Empeg Mk2a 60G