Inspection Using an Oscilloscope (Reference)

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Terminal:
2D, 2F(+) <==> ground (-)
Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Fig 1: Power Window Main Switch Voltage Waveform
Courtesy of MAZDA MOTORS CORP.