The ornamental design for a trailerhitchlockcoverhousing, as shown.
FIG. 1 is a perspective view of a trailer hitch lock housing and embodying our new design.
FIG. 2 is a top view thereof.
FIG. 3 is a bottom view thereof.
FIG. 4 is a rear view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is a side view thereof; and,
FIG. 7 is a side view as seen from the opposite side of that in FIG. 6.
The broken line showing of a portion of the trailer hitch lock housing is included for the purpose of illustrating environment and forms no part of the claimed design.