Quote:
Originally Posted by 335iredline
Capacitor stores excess power and distributes as needed from the source requesting it. Issue with BMW when switching to HID's is the HID bulb requires much less power to light than a typical halogen bulb. With less power needed our computer detects that it is consuming less than normal power and it throws an error code and also sends pulses repeatedly to ensure it is accurate as being bulb out situation (hence the flickering members speak of). Well when you add a capacitor it stores the excess power tricking the computer into thinking it is a normal situation and sends only amount needed for HID ballast to function in turn eliminating the error and pulse situation
I have no idea. Im pretty sure this is why US spec cars did not get this option lol
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Thanks for the explaination. One more question, shouldn't the capacitor be installed upstream of the ballast? Also, capacitors have resistence only when it is being charged, so if you turn the fog on, off then on again quickly, would that trigger an error code since the capacitor would have no time to discharge and therefore, has no resistence when you turn it on the second time around?