So I have been recently having electrical issues with my 04 TL for a few weeks now. On Christmas morning, for example, my horn randomly went off (my neighbors werent too joyful of such disturbance). I ended up disconnecting the battery for the remainder of the time until I fixed that with a new door sensor. (Acura is so damn theft-protective). Next, my dome lights would stay on for about 10 minutes after the engine was shut off/keys out of the ignition. I brought it to autozone to see if my battery was low; nope. After reconnecting the battery and regathering the NAV and radio code... everything seemed to be okay until i noticed that my main headlights are not ON. my turn signals and fogs are on, but not the main (middle) lights. I hope this isnt an expensive fix, because I am looking to trade them in to JnC soon! Any suggestions? Sorry for the shitty iphone pic. (This is on both sides)

 

My car was having similar problems, Water was getting to the fuse box and messing everything up. Other than that check fuses and relays.