Did you see what year the panel doors' method of routing electrical leads to the rear lamp changed from metal-to-metal contacts (door-to-body) to a spring-like conduit through-which the leads/wires were run to the stop/brake/marker lamp? I cannot find those parts in the MP&AC.
I found the metal-to-metal contacts in the 1929-1957 MP&AC.
Group # 2.447 37-51 Switch Tail and Stop Lamp parts numbers 594904 and 594905
1952 was year, they went to spring-like conduit.
I can't find the spring-like conduit in MP&AC though.
It is in the FAM.
Wire Assy. 5299935
sec.12, sheet 15.021 and 15.002
