1998 Nissan Altima problem with lights

1998 Nissan Altima mileage: 120,800. This car spent eight hours under water. I’ve stripped it down, disassembled, cleaned, everything top to bottom. It runs great. Problem is with taillights, rear side marker, tail license, and interior background lighting are inoperable. The rear stoplights, turn, backup, front side marker and clearance lights work fine. The fuse box was pulled apart and cleaned twice, all electrical connectors I could find were cleaned as well, all relays replaced, all fuses good. The combination switch was cleaned and checked per Haynes manual. Haynes manual page 12-30 shows a connection at J/C-5 that might be my problem, but I’m not sure where to locate J/C-5. I’ve replaced instrument cluster, main switches, and most every brain box, including numerous small boxes under dash. Willing to do more to get this light situation under control. Thanks.