Ford F-150 - 1997-2003 :: No Power To Fuses?

I started getting the 5 sets of 5 beeps which indicates an airbag error. My light doesn't come on when I turn off the passenger airbag switch and the light on the dash doesn't come on when I first cut the key on, so I started checking fuses. The airbag fuse, #22 tested fine. But while checking these things I found out that I have no power to the following fuses;

1. #16 headlights (hi beams), cluster (high beam indicator).
2. #18 instrument illumination (dimmer switch power).
3. #20 Audio, GEM, PCM, Transmission range sensor.
4. #21 DTR sensor, Clutch switch, Starter relay, I/P fuse 20.
5. #26 Right-hand low beam headlight.
6. #27 Foglamp relay and foglamp indicator, Main light switch (upstream).
7. #28 Left-hand low beam headlight.

All of the headlights, etc are working and the only service engine error I get when I use my code scanner is P0401. Why would these items work if I'm not getting power to the fuse block. These fuses are not blown mind you, not getting power to either side of the fuses.

I'm going to replace the bulb in the passenger side airbag switch, but what would keep the warning light on the dash from lighting up when I turn the switch on?

The truck is an 03 F150 XL, 2wd automatic transmission. Very basic work type truck, no fog lights, no power windows or doors, etc. It has the 4.6 Romeo engine in it.