In My Toyota Aqua car was not started in yesterday. i were try it on today morning indicate the dashboard sings not starting. then i off and after about onr hour try again and it was started and driving OK. But when the headlight, on the dash board going to dim and not headlight on but engine starting. then off the headlight switch and i tried to high beam it was working. when check the 12v battery (cover touch) going too hot. can you please tell me what is the reason for this?