First of all, thanks for all the great information in the forum. I have already found it to be of great benefit to me. Now, for the onion. I bought my first HD, a 2004 XL1200R with 5k miles in May of this year. It's been a pretty smooth ownership thus far. I have done no mechanical or electrical work - other than adding the factory smoked lenses/orange 1157s to the turn signals. Lately, a random electrical problem seems to have come up for no reason I can see. The check engine light began flashing sporatically while driving. It does not stay on, it just flashes here and there, then does not flash at all after driving for 20 mins or so. I pulled the codes and got the following. I used the book at the HD dealership to notate the codes like they have them in their reference manual: B1006: Acc line overvoltage. B1007: Ign line overvoltage. B1121: Left turn output fault. P0562: Batt voltage low. P0563: Batt voltage high. I reset the codes a few days ago. When I started today, I'm getting the same codes thrown again. The only thing that I have really noticed is that when using the HD-brand 1157 bulbs, my left front turn signal seemed dimmer than normal. When switching to standard 1157s, the problem went away. Additionally, I had some corrosion on the positive battery terminal that was causing a short when starting, but this has not been an issue since I cleaned the terminal and connections. Bike runs fine, no other noticable problems. Any insight would be helpful! Thanks in advance for your answers!