quick electrical question

ok here is a pic of a fusible link.
my question is, if these go bad will I be able to tell just from visual inspection like a regular fuse?
or do these even go bad?

fusibl22.jpg
 
It depends on the amperage. If you had a dead short you might see a slight browning of the wire but most of the time its dirty enought to look as if it were bernt when its not. Best thing I can suggest is get a volt meter that has a continuity option. That way you dont assume its good and look elseware.