A BAL-2 was installed on my 07 Dyna Low Rider in April of this year and I have had ZERO electrical issues with it so far. Husband has an 06 FLSTC-I and had Harley's LED tail light installed in the spring of 2010. No issues. Decided to get Harley's LED signal bar & signal lights and their LED fender tip LIGHTS FRONT AND REAR in the spring of 2011. We had NO ISSUES until last week, when the Engine light would re-appear for 3-4 seconds AFTER the engine start, then go off. We did a diagnostic's CODE CHECK on the odometer and found a P 0562 CODE which is the "BATTERY LOW VOLTAGE". We had a new battery installed in the spring as well and thought that maybe the Dealer didn't clear out the old diagnostics code. So we cleared the code and thought all was well
Then yesterday, not only did his engine light come on and go off again, but 40miles into the ride, the RED BATTERY LIGHT illuminated and stayed on until engine shut off. Same diagnostic's code re-appeared so we know we have a battery low voltage problem. Whether it's LED light related or maybe the voltage regulator is going, we dont know.
So it's back to the dealer to let them figure out stuff as we dont have the time or the experience to deal with electrical issues.
Below is the link to walk you through it. At least it's a start.