How do you turn off the rear differential light on a 1999 Toyota Land Cruiser?

To turn off the rear differential light on a 1999 Toyota Land Cruiser, first ensure that the vehicle is in a safe location and the engine is running. Then, check for any underlying issues, such as low differential fluid or a faulty sensor, and address them if necessary. If the light persists after resolving any mechanical issues, disconnect the vehicle's battery for a few minutes to reset the system. Reconnect the battery, and the light should turn off if there are no remaining issues.