Yesterday, my alternator quit on me and I can't thank my Se-R enough for doing that shit in rush hour traffic while sitting at a light. But anyway the question is when I popped my hood and checked out the alternator, I noticed that coming out of the wire loom leading to my alternator there is a small gauge brown wire with a black stripe on it and the end seems to have some type of metal plug or tip on it. Is it supposed to be plugged in or attached to something? I can't find anything on it in my Haynes. I would like to find out exactly what this wire is before I remove and install a new alternator.