I sent two other bulletins which has to be accomplished concurrently, so regardless of the fact that whether WDM has been revised or not, can you discern from these two bulletins how the oil pressure switch and the automatic heating system would be tied after complying with FAA AD2019-09-01
I went through 1400 pages with both bulletins. On one it's all structure mods. On the other is a detailed breakdown of all the wiring. The second one does not show a complete schematic of the whole system and I have no time to piecemeal all of it together.
I reviewed a set of 737 prints that I have. None show this oil pressure mod.
Do you not have a schematic manual???? Or wiring manual???