I have a 1991 f150 my headslights, horn, radio and dome lights are all not working.

All went out yesterday with no warning.

My blinkers and brake lights work.

The truck starts and runs fine.

Heater Fan is OK.

Checked the fuses and they seem to be fine. Changed out the headlight switch and still have same problem.

I need to know where to look next? Maybe the fuse link and if so where is that or those located?

Thanks

Zos