The ornamental design for a trailerwheellock, as shown and described.
FIG. 1 is a front view of the trailer wheel lock.
FIG. 2 is a rear view of the trailer wheel lock.
FIG. 3 is a top view of the trailer wheel lock.
FIG. 4 is a bottom view of the trailer wheel lock.
FIG. 5 is a right side view of the trailer wheel lock.
FIG. 6 is a left side view of the trailer wheel lock; and,
FIG. 7 is a perspective view of the trailer wheel lock; the broken line showing is included for the purpose of illustrating and forms no part of the claimed design.