I never heard of shorting out contacts to make sure it's working so assuming you didn't fry anything the following should allow it to work: Make sure batteries are new and loaded correctly according to the diagrams on the holder and the holder is installed correctly into the MD12 with the retaining screw tight. Place switch in the off position. Mount MD12 to camera. Move MD12 switch to on position. If shutter is not cocked you will hear the motor winder advance and cock the shutter. If the shutter is already cocked, press shutter release and it should advance. This works for my MD12 and FE2. I assume it would be the same for an FE.