WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Pinpoint Test 10: No Operation In Lower Speeds (Steps 1-5)
Courtesy of MAZDA MOTORS CORP.
Fig 2: Pinpoint Test 10: No Operation In Lower Speeds (Step 6 & Front Heater Blower Motor Resistor G-163 Terminal Identification)