Ducati Diavel Carbon Owner's Manual page 207

Note
Remove the left cowling to reach the main fuse
(see "Charging the battery" on page 169).
The main fuse (C, fig. 166) is positioned next to the
battery, on the solenoid starter (D). Remove the fuse
cap (E) to reach it.
A blown fuse is identified by the interrupted centre
link (F,fig. 167).
Important
To prevent short circuits, replace the fuse after
the Key-Off.
Warning
Never use a fuse with a rating other than
specified. Failure to observe this rule may damage
the electric system or even cause fire.
206
E
F
IN GOOD
CONDITION
C D
fig. 166
F
BLOWN
fig. 167