Dome lights are pretty simple designs, about the only way they fail is dirty bulb contacts or melting from being left on for far too long. If you've had problems with the dome lamp before then you should be pulling that apart first to check it for any obvious issues before you disassemble the door latch.

95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes