California Code of Regulations
Title 13 - Motor Vehicles
Division 2 - Department of the California Highway Patrol
Chapter 2 - Lighting Equipment
Article 16 - Reserve Lighting and Outage Indicating Systems
Section 774 - Voltage Requirements for Alternate Circuits
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
When the alternate circuit lamps are connected and the design voltage is applied to the input terminals of the device, voltages at output terminals shall be as follows:
(a) Headlamps--Lower Beam Outage Compensated by Upper Beam. Voltage to the upper beam filaments as reserve lower beam headlamps when one-half or more of the lower beam filaments fail shall be not more than 50% nor less than 40% of the design voltage of the upper beam filament.
(b) Headlamps--Upper Beam Outage Compensated by Lower Beam. Voltage to the lower beam filaments as reserve upper beam headlamps when one-half or more of the upper beam filaments fail shall be not less than 75% of the design voltage of the lower beam filament.
(c) Taillamps--Outage Compensated by Stoplamps. Voltage to the stoplamp filaments as reserve taillamps shall be not more than 50% nor less than 40% of the design voltage of the stoplamp filament.
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.
