See Figure 1. Insert the blade of a small screwdriver (or a coin) into the notch at the bottom of the lens cap. Carefully twist until the lens cap pops out of the lamp housing.

Push in bulb and rotate counterclockwise to remove bulb from socket.

Inspect condition of electrical contacts in socket. If necessary, clean with a small wire brush and electrical contact cleaner.

Liberally apply dielectric grease to contacts in socket and at bottom of new bulb.

Orient index pins on new bulb with pin guides inside bulb socket.

Push bulb in and turn clockwise to lock in place.

Snap lens cap back into the lamp holder. Rotate lens to position notch at bottom of lamp.