2001 sentra, starter wiring

I am looking for a wiring diagram.  In particular I need the section that details the starting circuitry.  I have removed the remote starter as well as the after-market alarm system because the vehicle is not starting.  I installed the alarm a couple of years ago but not the starter.  The place that installed the starter connected the 2 starter wires (BLACK / YELLOW and BLACK/ white) together with a diode even though the starter had multiple starter wire outputs.  The vehicle will start when a jumper wire is connected to the solenoid trigger on the starter motor itself, therefore the problem is definetly electrical.  I'm thinking it might simply be a broken wire but I can't find a manual for this car.  Any help is appreciated.

The ignition switch checks out fine.  When the key is turned 12 volts appears at the BLACK/ white wire.  This wire is supposed to feed the PNP relay.  The ground for this relay is provided when the car is in neutral or park.  What I really need is to find the location of the PNP relay so I can trace the circuit back from there to the switch and to the starter.    I'm assuming that the switch is right on the tranny.  I was hoping that someone had a schematic for the electrical system so I could avoid having to search around for the relay.   Thanks.