Turn the ignition and headlight switches off and pull out the "RTR 30 A" fuse

 

CAUTION: Unless power is disconnected, there is danger of the headlights suddenly retracting or extending and causing injury.

To raise or lower an inoperative headlight, remove the cover from the manual operation knob next to the inoperative headlight, and turn the knob clockwise.

After the headlights are extended, turn on the light switch and check to see that the lights come on.
When the headlights are retracted, they should match the silhouette of the vehicle body.
Be sure to have the system checked by your Toyota dealer as soon as possible.