Look in the fuse diagram to locate the fuse.
Pull out the fuse and check from the side to see whether the curved wire has blown.
If this is the case, replace it with a new fuse of the same colour and amperage.
Never use a foreign object or a fuse with an amperage higher than that specified when replacing a fuse. This could cause significant damage to the electrical system and possibly lead to fire.
Contact an authorised Volvo workshop about the fuses not mentioned in the owner's manual. If this is not performed correctly, it can cause serious damage to the electrical systems.