For MAIN Switch
WARNING: This page is about a different car, the 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Check for continuity between "1" and "8" terminals under each condition below.
If check result is not satisfactory, replace cruise control switch (2).
Cruise main switch (3) specification: [B]
Switch button released: Infinity
Switch button pressed: Continuity