odometer isn't recording mileage

I just bought a 1997 F - 150. I just noticed that the odometer is not recording the mileage. I know there could be a number of reasons but I don't know where to start, could someone please help.
Thanks

I wonder how many actual miles are on the truck then? You could have been ripped off. The truck may have a crazy amount of miles on it with you thinking there were less.

BTW - for resale it might not be a bad idea not to fix that problem.

I wonder how many actual miles are on the truck then? You could have been ripped off. The truck may have a crazy amount of miles on it with you thinking there were less.

BTW - for resale it might not be a bad idea not to fix that problem.

I did a history check on the vehicle and got numbers from last service and on trade. There is no problem with the mileage, I just don't know where to start on a fix.

Replaced The Instrument Cluster

First check to see if the speed senser is connected on the trans. The milage should read out as digital, do you have numbers or dashes in that space?