Just started digging into the harness- have a couple other issues before looking back at the TPS. IAC- turns out the switched 12V+ and the ecu (-) control were wired backwards (my reading shows pos is to the connector lock side). I was asked to replace the IAC- which I did with zero change in behavior. This IAC is for a mid 90's application FOTE-9F715-CA, I assume they have internal diodes and can I assume that both of these are bricked or (hoping here) that once the wiring is corrected they will work as intended- I'll find out soon enough.