Well, this is a lot of fun
The ignition switch was not the problem. Once again I started checking all of my wiring work and verifying splices, etc. Then I started unplugging connectors to see when the stray 10 volts would go away. None of the connectors I had worked on affected it. Back under the dash to the clutch pedal position switch--the voltage is on the Red/Light Blue wire. Then I decided to see if I missed something in the Harwood manual. They labeled this connector as C124 and say I'm supposed to connect the R/LB wire in that connector to Pink from pin 30 in C105. Well, it's not C124! It is C118 and there is no R/LB wire in this connector. However, if I unplug this sucker the stray 10 volts goes away. (this is on the driver side fenderwell)
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The EVTM does not have a pinout of this connector and very few of the wires in this 16 pin connector are even annotated in the manual. Tonight I'm going to try unplugging the electric shift module for the previous transfer case and see what happens. I've concluded that this problem was present when I bought the truck--and because it was present, the starter was the origin of the fire when I drove it home! If anyone has any other ideas, I'd be glad to hear them. Thanks.