§ 731. Operating Requirements.

Deceleration signal systems shall meet the following operating requirements:

(a) Function. The system shall operate so as to indicate a component of deceleration of the vehicle on which it is installed by varying the flashing rate of a yellow lamp when the service brakes are applied.

(b) Reduced Nighttime Brightness. The system shall incorporate an automatic means for reducing the intensity of the lamp during darkness. The system shall cause the voltage to the deceleration lamps to decrease to 5.0 V ± 10% at 0 g deceleration during darkness. The specified voltage shall be reached when the illumination on the sensor is not more than 53.8 lm/m<<super>>2 (5 lm/ft<<super>>2) nor less than 5.4 lm/m<<super>>2 (0.5 lm/ft<<super>>2).

Note

Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.