Fuses for taillights and keep blowing. Changed all the bulbs and fuses. No go

What is your question?

I keep blowing fuses for my taillights stop lights and directionals. I switched out all the fuses and bulbs and everything worked but the taillights. They came on when I hit the brakes but won’t when I turn on the headlights. Then I turned on the a/c and it happened again. Now I changed the fuse again and the taillights and directionals. Don’t work.

How long has your 2004 Ford Ranger had this problem?

Few weeks