1. Disconnect the negative battery cable..
2. Remove the sunvisor..
3. Verify that the continuity between the vanity mirror illumination terminals is as indicated in the table.

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

Side Turn Light Removal/InstallationBattery Recharging [Mzr 2.0, Mzr 2.5]
Using GR8-1291:
(See GR8-1291 INSTANT TRAINING MODULE (VIDEO) .)
WARNING:
Keep all flames away from the battery, otherwise evaporated gas from the
battery fluid may catch fire and cause serious injury.
1. Remove the battery filler caps and check the water level. If necessary, add ...
Crankshaft Position (CKP) Sensor Inspection [Mzr 2.0, Mzr 2.5]
Visual Inspection
CAUTION:
When foreign material such as an iron chip is on the CKP sensor, it can cause
abnormal output from the sensor because of flux turbulence and adversely affect
the engine control. Be sure there is no foreign material on the CKP sensor when
replacing.
...
If a warning light turns on or a warning buzzer sounds
If any warning indicator illuminates or a buzzer is activated in
your Subaru Solterra, remain calm and take appropriate action. A warning light that
briefly turns on and then goes off does not always indicate a malfunction. However,
if the issue repeats or persists, it is recommended to have t ...