1994 Olds blew fuel injector fuse

My 1994 Olds Delta 88 3.8L V-6, blew the fuel injector 10A fuse on the road. I then towed the car back home and started checking things. I replaced the minifuse and the car started fine. I disconnected all the fuel injectors and reconnected one at a time. The fuse didn’t blow again? What could have caused the 10A fuse to blow originally? I don’t want to be on the road/interstate and have it blow again going 60 mph, immediately killing the engine. What should I do to check/test the system to insure there is no short to ground/overamping to blow the fuse again.