Hi, I got a 1970 El Camino. I put a Retro sound head unit in it, and everything works fine. The only issue is, every once in a while when I shut the car off, the generator warning light and the radio don't turn off. The ignition is off, the engine isn't running, and the turn signals are not functioning, along with the other warning lights. If I disconnect the battery, the radio and gen light turn off, and everything works fine again. It doesn't always do this, only every once in a while. Does anyone have any ideas what may cause this? Only thing I can think of is the ignition switch, but it makes no sense that disconnecting the battery would fix this issue.