I have a 2000 Celica. The switch for the moon roof was wearing out. It would open but wasn't closing. I replaced the roof switch. I am not getting power to the switch. The interior light works fine. It appears the light and roof switch have the same wire for power. Is it possible that there are two separate grounds for the roof switch and the light switch? Or are there any other reasons why the button would not be getting power? Any help is appreciated.