Well after much ado...I replaced the switch, reattached a cable that had come off the slide pull system, and all seemed well in the driveway.
Once at the campsite...no joy.
Brought the camper home AGAIN and after great difficulty got the slide extended to look at the motor only to discover that two wires had melted their insulation when the motor overheated and were now making contact.
I fixed this and so far have had no further issues.
I am installing an inline fuse (40 amp) to hopefully negate this issue in the future and perhaps prevent a fire. I say this because the wires heated to the point that the switch became hot. To me not a safe thing to happen.
Tracer 3150 BHD
Silverado 1500 Crew