Ron, As far as I can remember, the low-fuel light doesn't get a "switch-on" test, but you can check it by temporarily placing a "jumper" from the its lead from the fuel sender to frame to see if the wiring may be at fault.
I also remember looking for a back-light for the turbometer - and the clock - and thinking Honda didn't ride the bike much at night.
Jim, Only too true. I don't know what the turbometer reads, 'cos I don't have time to watch more than the tacho, either.
Some guys here in Oz - and Chicago - want to know what the boost is for various "bars" on that meter, so I'm setting up to measure it soon - maybe after I see you next, in August. Time is running out for peripheral things, now.
The clock could certainly do with more backlight, though.
OK, Pete and George. The back-lights aren't "dedicated" ones, but there are six back-lights in all, in the CX500Turbo instrument cluster.
Looking at the "back" of the instruments (that which gets covered by the bonnet), start at the LH side (normally referred to as the RHS of the bike when you are sitting on it). There is one in the lower lefthand corner (behind the fuel gauge), then another light behind the red-line of the tacho, then another behind the "0" of the tacho. There are NO back-lights up near the top of the LHS of the instruments. All these three lights are along the LOWER edge of the instrument cluster body.
The next back-light is about two inches to the right of the instrument regulator, one about two inches to its right, and another (awkward to find) behind the loom clamped to the rear of the instrument cluster body, about 2 inches above the clock cancel/set knob. This last light is probably for the clock illumination. The first-mentioned one in this para. is probably meant to be the illumination for the turbometer, but, being covered up by the fairing mounting frame, it probably gets overlooked, or it's too difficult to get at.