[dw1]

To see if the engine compartment relay was working I accessed its socket pins, and also checked if the applicable front trunk relay was getting power.

The plug-in fuses for the footwell blowers are adjacent to the blowers themselves (I believe the Bentley manual shows this). As mentioned above, this may not be applicable to earlier 3.2 cars, but I also know '84-'86 cars where thes fuses were added (maybe via dealer service/recall?)

I also believe the Bentley manual shows which relay is which, and the pics posted above should help.

The main thing is to study the wiring diagram (remembering that your console switch is manual and not automatic) and follow the voltage path via DVM tests.