Hello, I am new to the forums. Never been one for using forums, but I finally had to join since no info for this came up after vigorous searching. I have this relay or resistor that clicks very sparatically even when the car is off. It eventually drains my batter if not started for a few weeks. It's in the passenger footwell. Waayyy up at the very top of all that mess. I can see the numbers "504," imprinted on it. Anybody ever had to deal with this guy or knows exactly what this does? And furthermore, should I be worried? Btw, my z (1975) is running rough. Idles @1300 and jumps 200 rpm's in both directions. Really hoping this relay has somthing to do with it. Thank you ahead of time:)