Ken
I had a dead electrical circuit which after a series of checks with a multimeter was located to a splice in the wire, when I cut the insulation open the metal crush joint the factory had used had turned to green dusty lumps due to damp causing corrosion leaving three lose wires.
Not knowing what the rest of the loom was like I unwrapped / removed the entire loom casing and found two more on their last legs ( every joint on mine is now soldered)