<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Try looking in your water/sewer compartment for the switch. </div></BLOCKQUOTE>
If I had a 3 yr old around I probably would have blamed the kid too, but the culprit was plain ol' me.
I found that the light switch in the water compartment turned on a light in the compartment AND the outside "patio" light. I also learned there was a second switch on the light in the compartment that would turn that light along on and off. With the light in the compartment turned off on the fixture, it took me several days to find that the main switch also operated the patio light!