Connector was causing discontinuity
I got mine figured out today. The tabs on the connector for the thumb warmer from the sled harness were relaxed and it was causing an intermittent open. Very hard to trace especially since there isn't a whole bunch of slack in the harness. I bent in the clips on the connector with a very small screwdriver through the opening and when I put it back together it was noticeably firmer pushing the connector together.