Engine hot and fan cooling it down?
Fan temperature sensor bad and it just thinks engine is hot and needs to be cooled down
wiper motor could be going bad
faulty hdlmp switch
Headlights might stay on in a Honda Odyssey after the engine is turned off because of a courtesy timer. The headlights will stay on for a few seconds after exiting the vehicle so the driver can go into a building at night safely. If the headlights are staying on all the time, check the timer for this feature.
The fans will probably stay on while the defroster is on because the A/C compressor is running.
Take your foot and put it under the brake pedal and pull up the pedal a little. The pedal for some reason is getting stuck and keeping the lights on. I've seen a few neons have this same problem.
if you leave the parking lights switch "ON" the lights will remain on, even if the car has been turned off.
2003 dodge neon that will start but will not stay running and dies after it starts?
Have vehicle scanned to determine problemv and/or clear codes
it would kill the batt.
Check the relay on the back side of the fuse box.
There are several reasons why a check engine light would constantly stay on a 1999 Plymouth Neon. There could be a bad valve, a bad sensor, or even a bad fuel pump. The only way to know the exact reason is to have the car checked out.
check your idle control valve located behind the engine