High beam indicator light (blue)
Nissan Altima / Nissan Altima Owners Manual / Instruments and controls / Warning/indicator lights and audible reminders / Indicator lights / High beam indicator light
(blue)

This blue light comes on when the headlight high beams are on and goes out when the low beams are selected.
The high beam indicator light also comes on when the passing signal is activated.
See also:
Changing a flat tire
If you have a flat tire, follow the instructions below: ...
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...
