Regarding the years for the engine harness being bio-degradable (?) I'd always suggest Dave Barton is the expert. Anyone who spent as much time as he did searching the yards for the updated harnesses has to know first hand.

On the door lock switch wiring, and for that matter, the tailgate harnesses, reverse switch wiring on an M47, for example, the year isn't important. Those wires were built with high strand count copper insulated with silicone rubber for use in places where the wire would be flexed often. I'm not sure what all affected the longevity of it, but I am somewhat sure by experience it makes no difference what year it was minted.
--
Art Benstein near Baltimore

King Ozymandias of Assyria was running low on cash after years of war with the Hittites. His last great possession was the Star of the Euphrates, the most valuable diamond in the ancient world. Desperate, he went to Croesus, the pawnbroker, to ask for a loan.

Croesus said, "I'll give you 100,000 dinars for it".

"But I paid a million dinars for it," the King protested. "Don't you know who I am? I am the king!"

Croesus replied, "When you wish to pawn a Star, makes no difference who you are."