Quote:
Originally Posted by TI-driftin  ok i disconnected my power wire that runs to my amp and i still get the idle drop when i turn my headlights on. I didn't use a multimeter to test my alt but my stereo has a volt meter on it and it says 13.2 when running and 12 something when off. I guess the only thing left is to check the engine ground. |
How much of a idle drop?
It is normal for a slight drop in RPM since when you turn on the lights it causes the alternator to take more HP to spin it to keep up with the amperage demand. 13.2 volts is acceptable. My car drops about 50 rpm when I turn my lights on and I have no electrical issues.