Hi my interior courtesy light started not dimming and doesn't go off when you lock the car the switch is in middle position also ignition barrel light isn't going out when locking or starting..I've checked all fuses nothing blown after googling it seems it may be the body integrated module if I have one or the illumination module again not sure which mine has on a 2002 wrx wagon..I might add this problem started after I looked at fitting some ghost shadow lights in the doors as I was going to wire them so they came on when door opens after checking with multimeter it seems courtesy light comes on with a neg earth when door switch opens..I've probably caught a connection and shorted something serves me right for messing in the dark with a torch..any ideas to solve it would be much appreciated...

Do you have standard sigma alarm or aftermarket ?

Hi it's got the standard sigma alarm.....