1. Disconnect the negative battery cable.
2. Remove the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
3. Disconnect the audio control switch connector.
4. Measure the resistance and inspect for continuity between the cruise control switch terminals using an ohmmeter.


Audio control switch removal/installation
Audio amplifier removal/installationMazda 6 Service Manual: Cruise Control Function
While this function is operating, the headway control operation is canceled and
only the cruise control function operates.
The vehicle speed can be set more than about 25 km/h (16 mph).
Use the cruise control function on expressways and other highways which do not
require a lot of repeated acc ...
Mazda 6 Service Manual: Headlights
Turn the headlight switch to turn the headlights and other exterior lights on
or off. When the lights are turned on, the lights-on indicator light in the instrument
cluster turns on.
NOTE
If the light switch is left on, the lights will automatically switch
off approximately 30 seconds ...