Honda Rebel 2017 Owner's Manual page 30

Indicators
(Continued)
26
High beam indicator
Turn signal indicator
ABS (Anti-lock Brake System) indicator
Comes on when the ignition switch is turned to
the (On) position. Goes off when your speed
reaches approximately 10 km/h (6 mph).
If it comes on while riding:
Neutral indicator
Comes on when the transmission is in Neutral.
(P.87)