IM not getting any power through the truck what to do

Will it start and run? What is it that doesn't have power?

Note the diagram. For the starter, the red wire at ignition switch is hot all the time. With the key in the crank position, the yellow wire goes hot. Carries voltage through the neutral or clutch switch, depending if the tranny is auto or manual. The purple wire at the starter solenoid should be hot with key in the crank position. Any testing at the starter make sure the tranny is in park or neutral and the e-brake is set.

You can see where the red wire comes from, backtrack the circuit for voltage.

So, does the bat terminal at the alternator have any voltage?

Are you using the negative battery post for a ground? The battery has a full charge? If your sure all the grounds are ok, replace circuit and fusible link from b+ to alternator bat terminal.

Just for testing, Take the connector loose from the alternator bat terminal. Insulate that wire don't let it touch anything, just in case. Use a jumper wire between positive battery post and alternator bat terminal, if the wire starts getting hot, take it loose. Use proper size wire. Don't forget the red wire that connects to that wire also, note diagram. If it works ok, go to the autostore and get a fusible link, place that in jumper wire. Route the jumper properly to get it out of the way. You will have to make a splice at the pigtail that comes from the positive battery post. Then there should be voltage at the alternator bat terminal.

I hope I'm not confusing you, I can show you better than I can tell you. I can't see much from here.

Hopefully you will have power.