1993 f150 5.0 .....How do you reset the computer ect ...while working today replacing a thermostat I unhooked the battery cables and cleaned them well ...;eft them unhooked a couple of hours.

When I finished and started truck trip meter is still holdfing the right mileage so it did not get cleard during this time.If I did want to clear codes and reset computer what would be the process to do it?

 

The odometer/trip meter is stored in the PSOM, no amount of battery disconnecting will reset them. Your PCM is reset if you left the cables off more than a few minutes.