Conduit in Mast
Assuming this is a running light, and your mast being un-steped. You should be able to access the wires at the foot of the mast. If there is a cap at the foot, it needs to be removed. When you get that far try pushing the wires back up the conduit. If that doesn''t work you''ll have to pull the wire all the way out and start over by running an electricians fish tape down from the light fixture, thru the conduit, and then attaching the wire to the fish tape then pulling it back up the the fixture. While the wire is out it would be a good time to replace it if it shows signs of corrsion. Be sure to use marine type tinned wire if replaced. If this light is at the mast head it would be good to remove the mast head also. If your not good working with metal you might want to take this to a specialist. The mast head is a critical part of your rigging and should be reinstalled properly.
As for the conduit it should be secured to the inside of the mast some how. Your halyards should not effect your wires........Del