It's hard to explain, but occasionally my headlight dinger (when you turn the truck off and open the door..the ding ding ding ding...yeah) doesn't turn on, or is VERY quiet, and I have very good hearing. Also, if I have the interior lights on and open the door while the truck is off, the dinger doesn't work, it never has for me. Any suggestions? I've never forgotten to turn the lights off, but I'm afraid of getting a dead battery.