Turn signals and cruise is working again. The turn signals must have just been a connection issue. The old cruise switch (from a different vehicle) was the culprit for the non-working cruise; I switched the switch, and it all works great now.
I got the headliner reinstalled, and the new (all dark) dash swapped in today. All electrical is working with the exception of the driver door speaker (next to be fixed). The center console will be replaced with a dark one to match the dash, and dark carpet will be swapped in, too.