just found that for some reason the box that controls the central locking, for some reason also controls the interior light.
i think this is because some of the later micras had an interior light that faded out rather than just switching off
apparently the unit is also coded to the key in some way,
i would check the plugs on the box, if not it may be the box itself that has gone. there is one on ebay,
http://cgi.ebay.co.uk/Nissan-Micra-K11-central-locking-control-ECU_W0QQitemZ230326293813QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item230326293813&_trksid=p3286.c0.m14&_trkparms=72:1683|66:4|65:12|39:1|240:1318
if you need a new one
