starting in 95 Panther has an OBD-II port and has OBD-II codes, not OBD-I codes.
starting in 94, 4.6 powered MN12s also are OBD-II (Cougar/Thunderbird)
There is a small one posted to the box forum, but I am sure I have consulted the lincolnsonline one while dealing with my 89 Cougar.
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00 Grand Marquis LS Premium - 97 Cougar 4.6 Sport - 89 Cougar LS - 63 Falcon 302 - 82 F-150 - 97 Mark VIII LSC - 2017 Escape SE - 2012 Fusion Sport AWD