Can A Blown Fuse Appear Normal?

Every now and then a customer of Klopp's Transmission & Auto Repair will ask us if it is possible for a fuse in their vehicle to look normal but to still be blown? We tell them that while a fuse may not appear to be bad, it could have blown outside of the visible area. Our technicians will often use a volt-meter as a quicker and more definitive method of checking for a blown fuse.