Interior lights, some stopped working and some are intermittent

[MJ243]

Hello all,
On my 1998 Marathon XL, 3 of the 4 driver’s side galley lights have stopped working. Then 2 of the 4 galley cabinet lights stopped working but now they are intermittent. Also 2 of the bedroom lights stopped but now the are working again.

Since there are several switches that control these lights there has to be a central box that turns power on and off. Any help would be appreciated.
Thanks,
Mark

[MJ243]

16001
16002
My problem is probably in one of these Power Switch boxes. Any ideas on where to look first?
Regards,
‘Mark

[Gil_J]

Those are transfer switches. So, it won't be them.

[Joe Camper]

Another lost sheep. When u bought that bus did u get any instructions?