So today i was sitting at mcdonalds drive thru and my car randomly shuts off and turns back on, only for about a half a second or so just enough to restart my radio (it didn't reset it just restart it, and the engine died down but didn't stop) then on my way home it does it once more while I'm driving, so i get home pull in my driveway turn the car off and remove the key, and the radio stops, then turns on with no key... i wouldn't have noticed but heard my radio playing as I'm walking in my house with my key in hand. Any idea what this could be? Had radio in for a year and no problems, amp all that is fused and seems to have good connections still ( just briefly checked though going to check a little further). And haven't done any electrical work for probably 6 months. Thanks for any help.