brake lights & turn signal

[wizzy01]

this is my first post...i have a 1977 oldsmobile delta 88 403ci
brake lights went out, hazzards dont work, left turn signal work not the right. when i turn the headlights on rear lights still dont work
im thinking it could be short circuit some where, fuse keep blowing out
i just need some help on where to start like what and where, can cause and should i check like fuses, circuits i just need a lil intell plz...

by the way i did check the bulbs


thanks for reading my post A.M