2005 Other Dodge Models START UP PROBLEM

When I turn off the key for any length of time and go to start up the Diesel truck, all electronics work great except for the oil pressre gauge, the fuel gauge, the temp gauge and the voltage gauge...don't kick in and the truck turns over, but acts like it's out of fuel (it's not). I then have to unhook the computer harness plug at the right hand side of the firewall and then plug it back in...then the truck will start...shut it off...long as I try to start in within 1 min. or less...it will start...if not..I have to do the above....also seems lke the tranny might be kicking in wrong also....any help is appreciated....Thank you,,,, geno[img]http://www.2carpros.com/forum/automotive_pictures/503277_210_1.jpg[/im]