Thanks much guys, I tested and it was the alternator I'm sure 99%. The battery is able to start the truck the battery voltage dropped 3 volts. (9.0)V. trying to accelerate the engine no voltage changes in the digital meter. The battery is weak I pull it out put into my other car jump start and drove 5 miles no problem still work on the next say . Next is to check the fuse line.
Thanks much,
Cheer.