Hello. The model number you gave me is on the microfische so it took me a while to research. You have a red wire that feeds 120Vac to the door switch. The voltage from the door switch is carried to the light socket by a black wire. The neutral of course is white. I would first check for 120Vac at the light socket [AP4014357]. If voltage is not there, carefully pry the door switch out and check for the voltage on the red wire. If voltage is there but not passing, replace the door switch [AP3132744]. If there is no voltage at the socket or the light switch, the next place to check is behind the unit. there is a metal plate mounted to the back of the unit which covers wiring and freon lines. There is probably at least 2 connectors behind this panel. One of these will be the one passing the voltage to the light. From here it's just a matter of hunt and search. I hope I have helped.