silkeepjs

Hi everyone. A bit of an electrical issue that has me disconnecting my battery before bed. Whenever it gets cold out, I have this electrical issue where my headlights come on randomly with the switch off, and stay on. Then the alarm will go off after a while. I can shut the alarm off, but the key will not lock nor unlock the doors. Then, if I try to start the car with the headlight switch off, it will not start, but when I turn the lights on, it will start fine. I havnt been able to figure out why this happens, but I do know it only happens when the weather outside drops below 50*F. On top of this, every time this happens, it does something to the ABS computer, because the VSA, ABS, BRAKE and little VSA triangle come on and stay on. I end up having to reset the ABS each time. If anyone has some insight as to what I should do, please tell me thanks!

polish_pat

Holy smokes...that's some weird issue. Have you modified your wiring? Added DRLs, remote starter, aftermarket alarm, or other?

If not, is it possible you have a water infiltration? 50 degrees seems like the perfect time for morning dew, where humidity is so high it starts to cover everything outside. Check maybe your relay box under the hood for anything suspicious...I'm saying that because I remember the horn and lighting relays to be in the same box.

01acls

You probably have a faulty Relay Control Module. Which is built into the large under hood fuse/relay box on the driver side.

Note: The head light is draining the battery causing the other secondary symptoms. All you need to do is fix the HL problem and the other symptoms should go away with it.

NBP04TL4ME

How old is your battery and/or when did you have it last tested??