1998 Toyota 4Runner Owners Manual - Page 158

4RUNNER (1998) For easy unlocking, slightly turn the steering wheel in either direction while the vehicle is in motion. When the differential lock is disengaged, the indicator light will go out. Parking brake The differential will also unlock if you shift the front drive control lever out of "L4". Never forget to turn off the switch after using this feature. To check the indicator bulb, turn the ignition key to the "ON" position, but do not start the engine. CAUTION Do not keep driving with the differential lock switch on. When parking, firmly apply the parking brake to avoid inadvertent creeping. To set: Pull up the lever. For better holding power, first depress the brake pedal and hold it while setting the brake. To release: Pull up the lever slightly, press the thumb button, and lower. To remind you that the parking brake is set, the parking brake reminder light in the instrument panel remains on until you release the parking brake.