An illuminating device in the position of use shall remain in that position if the malfunction referred to in 3.15.2.1 occurs alone or in conjunction with one of the malfunctions described in 3.15.2.2: 3.15.2.1. the absence of power for manipulating the lamp:
3.15.2.2. a break, impedance, or short-circuit to earth in the electrical circuit, defects in the hydraulic or pneumatic leads, Bowden cables, solenoids or other components controlling or transmitting the energy intended to activate the concealment device.
The transmission of braking power from the coupling head to the trailer's brakes shall be effected either by a rod linkage or by means of one or more fluids. However, a sheathed cable (Bowden cable) may be used to provide part of the transmission.
