For the 1999 Jeep Cherokee, both the low-beam and high-beam headlights use an H6054 bulb. The supplied fitment data does not identify a separate projector or non-projector headlight variation, so verify the existing headlamp before ordering.
Front fog lights may use either an H3 or H3C bulb. Exterior lighting is generally straightforward: front parking and turn signals use 3157 bulbs, while rear turn signals use 3157. Brake and tail lights use the red-tinted 3157R, and the center stop light uses 922. Front and rear side markers are listed as 194NA.
For replacement utility lighting, the license plate lamps may use 168 or 917 bulbs. The dome, engine, and trunk lights use 561, while the ashtray light uses 1891. Glove-box fitment is listed as either 194 or 7441. Courtesy, instrument, and map lighting have multiple listed options; compare the original bulb before selecting a replacement. The high-beam indicator and turn indicator use PC194.