Have a somewhat wierd problem. Yesterday I drove to the movies parked my car and when I came back I started it up. My radio has a security code and it was set off like it had been disconnected. I thought it was maybe a glitch in the radio or something. Well today the same thing happened only my car wouldnt start like there was no power, just one click noise no accesories or anything like the battery wasn't connected. What is the most likely cause? The terminals are clean and tight and the battery was tested good. After about 3 or 4 keyturns it started right up fast. Which ground or power wire is most likely to cause this?