what fuse should be replaced for the odometer

It runs off a mechanical gear..http://www.odometergears.com/products/Ford/Thunderbird+89-97/113

Every where I looked, at every fuse box diagram there is no fuse shown for speedometer or odometer. That does not mean there isn't one though. There were pictures of cables, mechanical cables that spin in a sheath from transmission to back of instrument cluster. Maybe you can see up there, if there is a cable. If so, it's really not that hard to replace if you can get to the speed/odo end, the transmission end is easy

Fordnut,is right,in your year model it is a direct cable.

Thanks TST. I wasn't sure

Did the spedo ever work and then suddenly quit? If so the cable broke. Most parts houses should be able to help you. I don't know af any fuseable spedo.