Thanks for the reference from the oldcarmanuaproject, I looked at the wiring schematic too . . . still not seeing the issue. Will need to do an a to z, once I know a procedure.

The battery was installed by the mechanic who helped get brakes and lights working so the truck could be driven, not hauled. I have read a number of articles on the Cadillac old car site and thought it was a decent idea? Have not had any issues in the past months. Other thoughts out there folks?

Only tried the headlights and turn signal / hazard lights up front. "She who must be obeyed" was awaiting my presents. Cab clearance lights did not come on either. Perhaps disconnecting everything at the gauges disrupted something?

Appreciate any and all insights folks.