Greetings all. I have a’05 Grand Cherokee limited 5.7. My issue is the auto headlights/auto sense are not working. I have replaced the sensor in the dash and they still do not work. I looked at the back of the rear view mirror to make sure nothing was unplugged and there is a third random plug that has no home. Can anyone tell me what this is for. Just bought the vehicle used so have no history. Thanks in advance.