1981 bronco nothing happens wen trying to start

The other day i was driving my truck around, and iturndit off, then tried starting it like 10 mins later and it would just click in the silenoid.. i have no idea what could be causing this, i replaiced the silenoid, and the starter.. i recently replaiced the alternator.. but it won`t start.. i got a new ignition switch but i havn`t got to try it yet.. but something tells me it won`t work.

buy a fucking chevy you faget, fords are gay as shit!