I previously posted this under electrical until I found that this might be a more appropriated area. I apologize in advance for double posting, I just want to get it in the correct area. I have a 2007 XL1200 with a Dobec (Techlusion) TFI tuner. It runs just fine. I let my son ride it on a trip we took and we hooked up a cigarette lighter socket direct to the battery to keep our cell phones charged. We checked the polarity and voltage with a meter prior to connecting either phone. Later in the first day of our trip we decided to connect one of the phones, the engine would crank but not fire. We unplugged the phone and the engine fired. Since we were on a long trip, we just forgot about it until I got home. I disconnected the TFI and the cell phones, GPS and everything else I could find that ran off a cigarette plug works fine and the engine starts and runs. If I reconnect the TFI, the engine will not start and my GPS won't turn on, it just flashes. I have sent Dobeck an email but they have not responded. Has anyone else had a similar experience? Does anyone have any ideas? Any and all help would be appreciated.