I have a 2012 MDX and the DRL Warning light is on and only one of the DRL lights is burning, the Driver side. We had the bulb replaced and it came back on. Thing is, when we turn the Lights on, both DRL lights come on. I thought there was only one bulb in there. So what could cause that. I see that a short or something could knock that one light bulb out, but then it works when the Lights are turned on.