How do you change the speedometer light bulbs in a 1991 Mitsubishi Galant?

To change the speedometer light bulbs in a 1991 Mitsubishi Galant, first disconnect the negative battery terminal for safety. Remove the dashboard trim and unscrew the instrument cluster to access the bulbs. Carefully twist and pull out the faulty bulbs, then replace them with new ones, ensuring they are securely fitted. Finally, reassemble the cluster and trim, reconnect the battery, and test the lights.