Noticed high beam light was on, then looked and seen bulb was out. Still had spot lights that lit up. Replaced bulb in headlight. Before screwing everything back into place hooked up headlight to connecter, turned on ignition and now I have no head light and no spots. I noticed the electrical plug that fits into the headlight is melted a little on one prong. Could be bad plug, however, why are my spots not working now?