I installed some HID conversion kits on my 01' XJ about 2 months ago. No problems until last week when the passenger side one suddenly just stopped working. After troubleshooting, I know the bulb is good, the ballast is good, and all of my fuses (engine bay and interior kick panel) are good. It's almost like theres no power going to that side. Any ideas?? Thanks

Trace the wiring to that light and look for cuts or burns in it, may be a burned wire from drawing too much current or something like that.

Agreed, wiring on Jeeps is always suspect. As suggested, retrace wiring as best you can. It might be fuse related but as it's only the passenger headlight it might not be. You can always upgrade the wiring harness If nothing else, it should help significantly with head light output. How did you go about checking that headlight and ballast are ok?

I swapped the passenger bulb to the driver side and it worked then I plugged the passenger ballast into the driver side and it still worked. I moved recently and have a multimeter coming from my old town right now, hopefully that will help

Once the multimeter gets there just do some continuity checks through the wiring to see if there are any opens anywhere. To me it sounds like there is if everything moved to the drivers side still works.