Spring has sprung... the sky is blue, air is warm(er)... time to crack on again trouble shooting the electrical system. Specifically the lousy soldered connections that I did with all the D-sub connectors at the Harness Support Tray. I started by trying to take apart some of the soldered pins and re-doing them more carefully and using shrink tube over each pin to protect it from the adjacent ones. However, this was not easy to do and to ensure a good solder joint. Plus I noticed that there appeared to be damage to the connector body around some of the pins. So... Plan B... use crimped style pins instead of solder style. That means replacing five whole D-sub connectors with the crimped pin variety and installing many dozens, perhaps a hundred, crimped pins on the ends of wires (each with shrink tube). The biggest cost in the order to Aircraft Spruce to do this was a high quality crimper (Daniels AFM8 - "The Little Blue Crimper") and the associated adapter (K13-1 Positioner). Having a plan at least makes me feel a lot better. Onwards, and eventually upwards.
9 June 2021 update: it turned out that with the crimped pins it was not necessary to use the shrink tube to protect the bare wire at the connectors as the wire insulation actually fits inside the connector housing - I only used shrink tube on the few larger guage wires that to be split into two pins and the shielded two conductor wires.
