1. Disconnect the negative battery cable..
2. Remove the cargo compartment light..
3. Verify that the continuity between the cargo compartment light terminals is as indicated in the table.

If not as indicated in the table, inspect the bulb. If there is no malfunction, replace the cargo compartment light.

Cargo Compartment Light Bulb Removal/Installation
Cargo Compartment Light Removal/InstallationSae Standards
In accordance with new regulations, SAE (Society of Automotive Engineers)
standard names and abbreviations are now used in this manual. The table below
lists the names and abbreviations that have been used in Mazda manuals up to
now and their SAE equivalents.
...
Side Wall Removal/Installation
1. Pull out the side wall in the direction shown in the direction of the arrow
shown in the figure, then remove the clips.
2. Remove the side wall in the direction of the arrow shown in the figure.
CAUTION:
When remove the side wall, be careful not to damage the guide.
3 ...
Active Driving Display
WARNING
Always adjust the display brightness and position with the vehicle
stopped:
Adjusting the display brightness and position while driving the vehicle
is dangerous as
doing so could distract your attention from the road ahead and lead to
an accident.
...