'91 Burb; no dash lights, A/C blower or radio

Vehicle: '91 Suburban, 3/4 ton, 2wd, 454. Last night the dash lights all stopped working. Further investigation yielded that the radio and front A/C blower now also did not work. All fuses (under dash fuse block) checked out. What little useful info the Haynes schematic provided showed some mysterious relationship between the headlight switch and the radio, so today I replaced the headlight switch. Same problem. If anyone can provide me with other potential problem areas or a source for a GOOD schematic I'd appreciate it.

dstone

Sounds like you might lost a leg from your fuse box. Are the fuses for these compnents in the same row (vertical) in your fuse box??