Typically when car is shut off, the head/tail lights will stay on for a short period of time. Yesterday, they decided to stay on no matter what. I flashed a flash light into the photo sensor and after a few seconds they shut off. Later that day, the same thing happened. I pulled the AUTO HDLPC and AUTO PRK relays from under the hood and now they seem to work as they should, but i have no tail lights. What seems more likely, the sensor being bad or one of the relays?