When i go out to my car and start it, I turn the headlights on and it takes about 10 seconds for the light to turn on. It only happens every once in awhile or when its really really cold out. The longest delay I have ever seen on it was when it was -35 degrees F outside so it seems its related to temperature. What would cause the lights to delay before turning on? Is there a relay or something? Where can I check?