I just got done installing an exterior two-light motion sensor light. The wiring from both the fixture and the wall were just the blacks and whites, no grounds. Later, when it was dark, I was experimenting with different motion sensor angles. On about the 4th time I moved the sensor there was an audible pop and it sparked. Oddly enough, this didn't trip the breaker and the light works fine. The house was built in 1923 and the wiring coming from the house looks very old. I'm thinking maybe the insulation on the hot and neutral got worn down over the years and touched when I adjusted the fixture. I'm keeping it off until I figure out the best course of action. Any ideas?

I removed my kitchen ceiling fan to clean it; but, when I reinstalled it, I was unable to find a connection that allowed the fan and light to energize independently. 120VAC enters the ceiling box; and, is conducted to the wall box where there is a 3-speed fan switch and an SPST light switch. In the wall box there are 2 additional wires for the fan and light circuit; and, another wire for a light in the breakfast nook. I can turn the fan and nook light on/off with the SPST switch; and, I can operate the fan with the 3-speed switch. My problem is that when I energize the fan switch, the fan light comes on even if the SPST switch is off. And, if I turn the SPST switch "on" while the fan is operating, the fan light goes off. Also, when I turn the fan light on while the fan is not operating, I hear a soft squeal as if the current is passing through the fan motor. I've tried reversing polarity at the switches; but, the same issue continues. Any ideas on how to resolve this? Mfd by Crompton Greaves Ltd Bombay, India 1200mm sweep 77 watts 110vac Type CZ66 60 Hz Dist. by Encon Ind. Inc.