Main Switch

The main switch is the main power supply switch of the cruise control module. It has a built-in power indicator and night illumination light.
When the ignition switch is placed in the OFF position with the main switch ON, the main switch is also turned OFF. Even if the ignition switch is turned ON again, the main switch will stay in the OFF state.

Fig 1: Identifying Cruise Control Main Switch
Courtesy of SUBARU OF AMERICA, INC.