Nissan 26705-89941 Headlamp Unit

Start by removing the headlight retaining ring screws, which include three or four short screws and two longer screws used for aiming; avoid tampering with the longer screws. For round headlights, turn the ring clockwise to remove it, then pull the headlight bulb from its socket and disconnect the electrical plug. To install, connect the plug to the new bulb, position the headlight in the shell ensuring the word "TOP" is at the top and the knobs engage the slots, place the retaining ring over the bulb, and install the screws. Check the headlight system for proper operation and adjust the aim if necessary.

A properly aimed low beam should project a high-intensity pattern on the alignment screen from 2 inches above to 2 inches below the headlamp center line, with the side-to-side pattern extending 2 inches left and right.