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Message: <blockquote data-quote="mcglsr2" data-source="post: 1421886" data-attributes="member: 15705">Normal headlights or have projectors been installed?I agree with ttocs, I'd be surprised that the draw on the lights would pull your alternator down.  More likely, I think, is 1 of two things:<ol> <li data-xf-list-type="ol">You have a short in your lighting wiring.  When you turn the lights on, something somehow shorts, making the draw way more then it would normally be</li> <li data-xf-list-type="ol">Still with the lighting wires, you have a nick or cut in a bundle of wires, and the lighting wire(s) are touching something important like a fuel pump wire or an engine sensor wire or something; something that when the lights are on it effs up some other wire that engine/ECU needs to run or idle.  I'm not sure what this could be without tracing the lighting wires in a wiring diagram.</li> </ol>Also, does your car not have a battery?  I find it weird that your car dies from just the alternator, unless your battery is not present or dead.  The car will pull from the battery if the alternator isn't keeping up.  If your battery is present and fully charged, and your lights cause the car to die, then that makes me lean more towards item #2 above.</blockquote>