What is the sequence for testing lights?

[QuinnMarie]

Testing light sequence: 1. Drive the vehicle to be tested into the tester as perpendicular as possible to the screen or guide rail of the tester, keeping a distance of 3m between the headlights and the tester's receiver; 2. Use the vehicle alignment device to ensure the tester is properly aligned with the vehicle; 3. Turn on the headlights, use the headlight aligner to align the tester with the headlights to be tested, then adjust the fixed screen to the same height as the headlights, paying special attention to ensure the receiver coincides with the center of the headlight's lens surface; 4. Align the zero points of the left and right optical axis scales on the fixed screen with the reference pointer on the movable screen; 5. Move the receiver up, down, left, and right until the photometer reading reaches its maximum value. At this point, the optical axis deviation can be determined based on the vertical scale value indicated by the reference pointer on the movable screen and the horizontal scale value indicated by the reference pointer on the fixed screen; 6. The luminous intensity of the headlights can be determined based on the photometer reading at this time.