Document ID: chunk:federal_register_of_legislation:F2021C00434:body:0:p6
Version: federal_register_of_legislation:F2021C00434
Segment Type: other
Provision Reference: 
Character Range: 16875–19939

a failure exists in the brake system) it must not operate when the "engine start" circuit is not energised; or
4.2.6.5.                        the ignition or electrical control switch is in the "engine on" position and the 'Parking Brake System 35/..' is engaged for vehicles where the 'Service Brake System' failure 'Visible Indicator' and the Parking Brake indicator lamp are combined.
4.2.7.                              For vehicles equipped with an automatic transmission, the operation as a check of indicator function is not required when the transmission control lever is in a "forward" or "reverse" drive position.
4.2.8.                              The 'Visible Indicator' system must be so designed that once having become operative to signal a brake failure it must operate whenever the ignition or electrical control switch is in the "engine on" position and the fault remains uncorrected.
4.2.9.                              The 'Visible Indicator' may take the form of an indicator lamp or of a mechanical signalling device.
4.2.10.                          Where an indicator lamp is used the lamp must be labelled with at least the word "BRAKE" or, the symbol for "BRAKE FAILURE" specified in International Standard ISO 2575-2000 - "Road Vehicles - Symbols for controls indicators and tell-tales" placed either directly on the lens or adjacent to it in such a way that the label is illuminated by the same light source as the lens.
4.2.10.1.                    The letters of the label must be not less than 3 mm high and must be of a contrasting colour to their background when illuminated.
4.2.10.2.                    If the label is directly on the lens the colour of either label or lens must be red and if the label is not on the lens the colour of the lens must be red.
4.2.10.3.                    An illuminated lamp may be either steady-burning or flashing.
4.2.11.                          Where a mechanical signalling device is used, it must display at least the word "BRAKE" in letters not less than 10 mm high when the signal is deployed.  Letters and background must be of contrasting colours, one of which is red.
4.2.12.                          The  'Service Brake System' failure 'Visible Indicator' and its specified label or display must be totally located forward of a transverse vertical plane through the point representing the intersection of the steering wheel axis of rotation and the plane of the steering wheel, and totally within the space bounded by:
4.2.12.1.                    the right-hand internal side wall;
4.2.12.2.                    a vertical plane along the longitudinal centre line of the vehicle;
4.2.12.3.                    a horizontal plane through a point on the lower edge of the instrument panel; and
4.2.12.4.                    a horizontal plane 150 mm above the highest point on the windscreen glass.
4.3.                                    'Parking Brake System 35/..'
4.3.1.                              The vehicle must be equipped with a 'Parking Brake System 35/..' such that in the