Has anybody seen the rear dome light out on an 01lw300?

Front dome lamp is fine. Rear was intermittent for a while and now is
solidly out. There is no power at any of the three wires at the lamp. As
best I can figure, the orange wire should be the hot wire.

I'm hoping that this is just a bad connection somewhere. The service manual
is not much help to find where the harnesses run. I believe that the
headliner harness terminates somewhere the right side kick panel fuse box.
Don't know if there is an inline connector in the headliner at all.

Thanks for any info
Oppie