We got the truck started and driving.
Made up a probe to put voltage on the starter solenoid. 18" or so of steel rod, insulated the length of the probe, save about a 1/8" of the tip. Attached a wire to the opposite end and clamped that to the battery post. Pretty much the same process as crossing the terminals on the starter solenoid itself, just a little easier to do and less chance of crossing up to the wrong piece of metal.
Since we did this to get it running and out of the way for the upcoming work week, we also eliminated the starter and batteries from the troubleshooting scenario.
While we had it running, we went ahead and adjusted the VRV after installing the new vacuum pump. What a difference! Still a nice firm shift but at a reasonable RPM.
Got a lot of other maintenance details taken care of as well. It appears when it belonged to the state of SD. Some electrical was added for their spraying duties. Those devices have since been removed but the wiring remained. We yanked a lot of that out of there. I don't like wires hanging and doing nothing. Makes electrical trouble shooting much more time consuming.
We also took the time to get all the headlights and tail lights up to par. Instrument lighting is non operational. We checked the fuse and its in good shape. Bulbs themselves, or at least the few that we checked are not burnt out. I think that leaves us with a bad switch. I have one sitting in a parts truck so next time we're working on it, we'll grab that and swap 'em out.
A shot of the probe.
We also got the rear bumper swapped out. Much cleaner look. We'll probably go back and put some "skate board" tape on it in a few strategic locations.