I didn't know anyone was interested....after checking the fuses/breakers/connections in the compartment under the driver's window, he went under the dashboard.
Reaching up he grabbed a bunch of wires and, with the key in the "on" position, the lights and camera image flashed (just like we hit a bump again), so he replicated the problem! He removed the boot covering the steering columm (to rule out a ground wire problem), and re- fastened the two loose wires to the back of the plug from which they became detached. He said the tie was too tight, and they were pulling against themselves. So, when he re-tied them he tied it a little looser, but made sure they were well fastened to the plug.
He and Tom worked together great, and I thanked them both for helping solve a three week old problem.
2016 Winnebago Grand Tour QL
2006 Hummer H2