Ike, when you made your 12v to 5v regulator, did you use capacitors? I'm fairly familiar with reading wiring schematics as shown on the SminnTech website. Although I'm a little confused. To me it looks like he's grounding the capacitors on both the input and output of the 7805. Is this correct? I'm going to be installing my Avic-D3 this weekend and have all the parts needed, I'm just unsure about the caps on the voltage regulator. Thanks much, JJ