What happened to me the last two days is the most dreaded form of ass kicking, the self inflicted type.
What should have been a simple 30 minute fix ended up taking me about 6 hours due to small but critical error.
One of the girls reported to me that the 3 accent lights in the lav are not working. I go to check it out try getting them to turn on from a diffrent panel check the CB ect no luck. 3 lights out in the same area smells like a controller to me very common issue with our aircraft.
I didn't have a meter with me so I go to the spare parts kit and pop a new bulb in doesn't light up. In my mind its exactly as i expected must be the controller.
So I goto the very poor wiring diagram find that the controller is supposedly in the ceiling in the front of the aircraft (it wasnt) I spent about 4 hours to finally locate this controller it's in the mid cabin under some panels that will require roughly 8 hours to take down and put back up. So at this point I called it a day.
Next day I decided since it will be such a pain to access the controller I will pull down the ceiling in the lav and do an inspection make sure everything is plugged in ect.
Now that I have my meter I decided that I would check while. I'm in here the plug for the light bulb, what did I find. 28v?!? I checked the other 2 plugs same. How could this be I tried the light agian no good. I got a dc power supply out and hit all 3 lights no good. I went and got another light popped it in and it lit up. Replaced the other two bulbs bang there was light. My first bulb was bad from stock, and since I was to lazy to get a meter in the beginning i ended up doing about 6 hours of work with the aircraft outside in 120+ heat where the packs cant keep up.
Moral of the story dont be lazy dont trust parts from stock trust your meter cutting corners will cost you just like this.