The ornamental design for a taillightassembly for a vehicle, as shown and described.
FIG. 1 is a perspective view of a taillight assembly for a vehicle showing the design;
FIG. 2 is a front elevational view of the taillight assembly for a vehicle of FIG. 1;
FIG. 3 is a back elevational view of the taillight assembly for a vehicle of FIG. 1;
FIG. 4 is a top plan view of the taillight assembly for a vehicle of FIG. 1;
FIG. 5 is a bottom plan view of the taillight assembly for a vehicle of FIG. 1;
FIG. 6 is left side elevational view of the taillight assembly for a vehicle of FIG. 1; and,
FIG. 7 is a right side elevational view of the taillight assembly for a vehicle of FIG. 1.
The broken lines are included for the purpose of illustrating environmental structure and form no part of the claimed design. Portions of the claimed design are shown separated and bound by a bracket to indicate indeterminate length.