how do i make the hatchback keyless entry work?

[ogkush]

i just bought a supra about a month ago, its an 87 mkIII. the keyless entry for the rear hatch wont work so i always have to pop it from inside by the driver seat, it would be nice to figure out why this isnt working, i tried looking around the hatch itself and the fuses but im not sure if their is a fuse for this.

any kind of help would be nice so plz leave comments.