" Thirty minutes later started car did a half a turn and car shut off"
"half turn" sounds like the battery, connection, or starter problems.
Later portion of this deals with connections.
Battery can be tested in or out of your rig at a popular auto parts store, you can get it running and over there (with a jump or a "charged battery". this same machine can test your entire charging system to insure your battery is being charged by the alternator if it is not, you will soon be back in the same situation.
Keep us posted
Images (click to enlarge)
Sunday, September 9th, 2012 AT 7:42 PM