Pulled Out Wire Splice Repair
If a wire has become disconnected from its splice, it can be repaired by splicing the disconnected wire to one of the wires still part of the original splice.
Cut the undamaged wire of the original splice and with a suitable splice connector, clamp the splice side of the wire. Fit a suitable section of glue lined heat shrink sleeve to the splice the wire had disconnected from. Insert the disconnected wire and the undamaged wire into the splice connector and clamp the splice connector.