WARNING: This page is about a different car, the 2003 Suzuki XL-7 and 2003 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Blower Motor Controller Resistance Chart
Courtesy of SUZUKI OF AMERICA CORP.
Fig 2: Measuring Each Terminal-To-Terminal Resistance On Blower Motor Controller