my son took out his charger for its first run, after about 10 min . the headlights turn off? all other lights stay on and are working normal. if you turn them off for a few minutes and turn them back on they work for a few min. then shut off again. I did a search for headlight relay but all that comes up is the headlight switch which is new (from autozone).is the relay in the switch or somewhere else? Thanks for any help.