How do you remove a speedo head from a 1989 Mazda 323?

To remove the speedo head from a 1989 Mazda 323, first disconnect the negative battery terminal for safety. Then, remove the dashboard panel to access the instrument cluster. Unscrew the screws holding the speedo head in place, disconnect the speedometer cable, and carefully pull the speedo head out of the cluster. Reassemble the dashboard once the speedo head is replaced or serviced.