The links in my post
in that sticky
Decode your coach's VIN to determine the model year of its chassis. Link to Ford's VIN guides is here
The link to Ford's online owner's manuals is here
. Here is the link
to the chassis owner's manual for a model-year 2000 chassis. Passenger Compartment Fuse Panel info starts on page 42.
There's another Ford fuse box under the hood, called the "Power Distribution Box." The manual has info on the PDB starting on page 44. The cigar lighter fuse is #22 in that box.
Interesting that someone thought it necessary to apply electrician's tape to the relays shown in your picture.