I don't know why or where to look next.
Heres what I do know.
The Battery fully charged, the output is good, and only 6 month old.
The Starter is 18 month old.
The Alternate functioned well last time the vehicle was running.
When I take my ignition to "ON" all electrical components and dash lights are on.
When I take my ignition to "Start", the ignition clicks once,the Radio and clock go out, and the dash lights slightly dim. No noise is heard other that a very quite hum. No turnover, no clicking. The truck essentially does nothing. Also the readings from the battery never change, so it isn't even trying to draw from the battery.