To use the vanity mirror, lower the sunvisor.
If your vehicle is equipped with a vanity mirror light, it will illuminate when you open the cover.
To prevent the battery from being discharged, the vanity mirror will only illuminate in the tilt range shown below.

Side Extension Sunvisors
Interior LightsGenerator Inspection [Mzr 2.0, Mzr 2.5]
CAUTION:
Do not apply direct battery positive voltage to generator terminal D, otherwise
it could cause damage to the internal parts (power transistor) of the generator.
Generator Warning Light
1. Verify that the battery is fully charged.
2. Verify that the drive belt is correct. ...
Vanity Mirror Illumination Inspection
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.
...
Pilot Bearing Inspection [G66 M R]
1. Perform the following procedures.
a. Remove the battery cover..
b. Disconnect the negative battery cable.
c. Remove the battery component. (ex: battery, battery tray and PCM component).
d. Remove the air cleaner component..
e. Remove the exhaust manifold insulator installation bolts an ...