I have seen fuses that look fine to the eye but have failed where the fuse wire contacts the metal and only show open circuit with a multi meter.
then there have been fuses that read fine with a meter but go open circuit with a load, but when you remove the load they test ok again.
were you testing it with the flipper button pressed in and with both the meter probes across the coil?
or did you ground the black multi meter wire to a braded ground wire else were?