my 1997 chevy engine will not turn over to start?

I can start it by jumping the purple wire on the starter solenoid to the positive lead there. should I bypass the park/neural safety switch on the transmission next ? there are two plugs on the shift lever on the transmission, one has about 6 wires going into it and is blue and the other one has two wires going to it and is white, I think, about the colors. I did pull off the starter and had it checked out at a parts dealer and I heard it crank over. I also pulled off the steering wheel (like an idiot) because I was told the neutral safety switch was there and could also not get down far enough th get to the ignition switch electrical connection. I got as far as being able to unscrew the locking screw for the tumbler but not the electrical plug. At the base of the steering collon by the brake pedal is a bundle of wires going from the floor up the colom. I noticed a purple wire in that bundle of about 12 wires and shaved a little insulation off of it, then I applied positive voltage to it from thr horn lead and then negative voltage also. the only result I got was the horn to blow a few times. I an interested in bypassing this neutral safety switch as a easy step to help me figure out what in the name of Pig Poop is going on here. I am very poor and live in this rv and any help would make my life so much greater,,,Thanks Mike