Originally Posted by Ash
This pinout is for a later model, but I believe there's little to no difference between it and the wiring on the NAS trucks. Should get you close if it isn't exact.
Ok, one step at a time. I read this that there should be 4 wires off the back of the ignition key switch :
1 big brown wire
2 big white wire
3 smaller white /red wire
4 smaller white/orange wire
All going to where they are supposed to or, sailing the river Styx...