2013 mini with N16. 37000 km. Weird electrical problems with harness to steering column SZL. It started with adjusting tilt steering and various lights came on the dash. I thought it was the connector on the back of the spring. When I wiggled at the connector it would flake out. It would not flake if I wiggled harness where it entered dash.
Things I have done that haven't worked.

1. Cleaned connectors. Didn't work.

2. Dismantled female connector on wiring harness side, removed all pins and cleaned. Tested with multimeter. All good. Didn't work.
3. Dismantled clock spring/SZL and checked the connector pins on the circuit board with multimeter. They were all good.
4. Got matching new female connector from parts puller and spliced it in. Checked each new wire with multimeter. Didn't work. I was very surprised this didn't work.
5. Next I created a wiring harness to connect male SZL connector to the new female wiring harness connector. I did this to see confirm which side of the connection was flaky. Doing this it was apparent the problem was on the harness coming from the car. However only if I jiggled the wires near the connector. 6. I completely unwound the tape around the wire from under the dash to the connector.There is no visual wire damage I can't isolate to a single wire. It only happens if I jiggle near the connector. At times it takes serious jiggling to happen,other times I barely touch it. I am out of ideas.

Pic shows current state. New connector spliced in, with test harness between the connectors.