This past 2 month my factory alternator started going I thought. My dash lights started to pulseate and my battery light would appear. So I changed it. It took 3 try's to order the right alternator. The backing a were always wrong and so on. It's been about a month I have had the new alternator and just yesterday when I was listening to music my lights dim and the abs bas light came on. Since then my light palseate at idle. I did a test with a volt meter to the back of the alternator and getting 13.2 - 13.6 while running. The lights were pulseateing at the time I was getting that reading. Recently thought I have been getting a code for my secondary air injection it comes and goes at random stays on for a day max. Could that be drawing power? I don't know if its another bad alternator or something else is up. My battery is from 6/11 which isn't that old. Is there a external voltage regulator or something. Or any ideas what is going on. Please pass along to someone that may have an idea if you don't. Thank you.