The VR is a good place to start, the 2012 has had a history of VR issues and there was even a recall issued by HD on the VR on the 2012 models. The p0563 code is a high voltage code and usually the 1st DTC is the problem and the DTC's that follow are secondary DTC's. Clear the DTC's and see if they return and if they do check the VR or just replace it. Replacing the VR is a easy DIY with basic hand tools. Don't forget to check the battery connections too.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.