Ford Repair: electrical, turn signal switch, brake light switch

Question
QUESTION: my 1980 ford bronco tail brake and back blinkers dont work (reverse do)  wat can be the problem or wat should i check

ANSWER: if the bulbs are ok and fuses good then check turn signal switch brake lights go thru it also.

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QUESTION: how do i do that

Answer
easiest test is to get a test light and go down to the brake light switch at your brake pedal-check and see if you have power to one wire with key on-if so push brake pedal with your hand and see if you have power on the other wire if you do you probably have a bad t/signal switch because when the power leaves the brake light switch it goes back through the turn switch then back out to the lights.