91 Tercel Back Up Light outage

Hi all,
I've got to track down a backup light problem and need some advice. My service manual says to first check bulbs (done that), then check fuse. Where is the fuse??? I don't want to move to step 3 (check neutral safety switch) if I can get away with maybe just replacing the fuse.
Anyone ever dealt with this problem before? I'd appreciate any advice you can offer.
-Drew

the fuse should be in the fuse box just to the lower left of the steering wheel, under a llittle removable panel

Thnx. Those fuses are all good. I didn't know if there was another line fuse in there somewhere. Guess I'm onto step 2......get under the car and check for power to and from the switch.