i have a 98 cherokee and the passenger tail light doesnt work when lights are on but brake light works. i have checked the #23 fuse under the dash and looked good just a little corrosion on wiped it off and and tried that fuse plus a new one. i have googled and searched the heck out of this but havent found anything yet.

 

Sounds like it's burned out.

 

Sounds like you just need to replace the bulb, I believe on mine, they're all separate bulbs.

 

yes they're all separate. I just replaced all the bulbs in my tail lights with some LEDs from eBay for under $10!