86 ford truck no crank no start no power
 

Second selonoid in . Truck running fine 3rd replaced starter selonoid truck turned on. Let truck set for 30minutes turn truck off. After I turned truck off tried turning it on . This time truck selonoid stays open circuit removed negative wire from battery. ..... What its causing it to trip like that check all connection they clean and tight just replaced starter alternator battery and starter selenoid on this truck...... Help!!

Sounds like the ignition switch is shorting out to the starter solenoid.