It takes power direct from the ZFE, central chassis computer, if the zfe senses an overload, short or anything else wrong it shuts down power to that wire, this goes for all wires on the bike, hence no need for fuses, it is electrnicly controlled. Remove the problem and the zfe turns power back on.
It's like solid state fuses.
So, check all the wire's in the diagnostic port for breaks or a short to ground.
Turn bike off and use a multimeter set to continuity and measure between ground and each connector, should only be one that gives a beep, the ground wire. If only that one gives a beep there is no short.
To check for breaks measure from end to end of the wires the same way, all should beep.