I assume you are referring to the 89 flashers ?

It they are the two flashers near the playfield runner - where the playfield slides in and out - you may find the tab on the 89 socket holder has shorted to ground on the runner. VERY easy to do. Just check the tabs on the globe holders CANNOT touch the runner when the playfield is lowered.

Yes - you would have blown a fuse. You may have blown two if the relay is not switching between the flashers and the coils.