Are the PDM and ECM different?
I pulled off the front plastic and found a finned aluminum box, which I assume is the ECM. I pulled the plug off of it, and tried to check the voltage at each pin (or hole) in the plug (not the EMC itself). I couldn't find 12V anywhere. However, on a couple of the pins, my multimeter registered .03-.04V. Connected to nothing, the meter read 0.00, and only moved to .03-04 when I touched the plug.
There is also a black plastic box mounted just about the aluminum finned box. Is that the PDM?
(and I did test every connection on both kill switch plugs, with no voltage present either)