Ok, I got a good battery in there and cranked, no start. Dash reads "no bus", scan tool says no communication. All the dash lights light up when you turn the key to on, but the fuel gauge and voltmeter don't move. I checked continuity of the bus between the engine computer and CTM and it was good. I don't like how shallow the pins fit on the instrument cluster, but it looks like there is contact.

The connectors don't look real good at the engine computer and I'd still like to replace the underhood harness, but my junkyarding today turned up nothing. The odometer does flash a few times when you cycle the key on-off-on-off-on and then displays the no bus. The radio does work and so do the power windows and locks.