Ignition woes

you have helped me and being apart makes problem solving hard. I have 12.4 volts +- .2 at 5 wires at the power splice, but when I turn the ignition key to run, it drops to 10 something. I have 12.3 volts at the red battery wire going up the steering column, J1-12R. But when I turn the ignition switch to 'run,' voltage drops to 10 something. Now on the start circuit, I get the same old drop, but I noticed when turning the key all the way to start, if I let up on the switch a tiny bit, voltage goes for an instant to 12 something. I now see the effect of this low voltage in the steering column spreads throughout the whole system, when I turn the key. Also, the voltage drop test from the blue, J2A-16 DBL under the steering column is around 2.8 volts.