Auto Headlights problem
Thread Starter
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Amateur
Joined: Feb 2009
Posts: 26
Likes: 0
From: Jacksonville, FL
Auto Headlights problem
So, I got a 2012 Ram to match my 2010 Ram and they both have auto headlights. I got the 2012 used and the second day, the auto headlights didn't work when I left in the morning for work (5am). When I got home I figured i would test the sensor with the one from the 2010 as they are the same. However, when I went to test before removing it from the 2012, they were working again. I decided to test using a flashlight to get them to turn off. The headlights on the 2012 did not go off when I shined the light on the sun sensor, but they did on the 2010. When I disconnected the sensor on the dash of the 2012, the auto headlights still came on when I started the truck. The 2012 has the 430/430N nav unit and I'm starting to wonder if the automatic daytime/nightime display for the nav unit is messing with the auto headlights. Has anyone encountered this problem before?Any help is appreciated.
Thread Starter
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Amateur
Joined: Feb 2009
Posts: 26
Likes: 0
From: Jacksonville, FL
Update**
So I've determined that the sensor on the dash is bad. It operates when the sun is setting or rising, but when it's pitch black the lights won't turn on automatically. I figured this out when I was driving through shaded areas and the lights were turning on and off via the sensor. When I got home I switched the sensor out with my 2010 Ram and the suspect sensor took a long time to switch the lights on and off in the other truck. When I put the good sensor in the 2012, it worked flawlessly. I hope this helps someone else who is having a similar issue.
So I've determined that the sensor on the dash is bad. It operates when the sun is setting or rising, but when it's pitch black the lights won't turn on automatically. I figured this out when I was driving through shaded areas and the lights were turning on and off via the sensor. When I got home I switched the sensor out with my 2010 Ram and the suspect sensor took a long time to switch the lights on and off in the other truck. When I put the good sensor in the 2012, it worked flawlessly. I hope this helps someone else who is having a similar issue.
Champion
Joined: Jul 2011
Posts: 3,053
Likes: 28
From: Mopar HQ
Update**
So I've determined that the sensor on the dash is bad. It operates when the sun is setting or rising, but when it's pitch black the lights won't turn on automatically. I figured this out when I was driving through shaded areas and the lights were turning on and off via the sensor. When I got home I switched the sensor out with my 2010 Ram and the suspect sensor took a long time to switch the lights on and off in the other truck. When I put the good sensor in the 2012, it worked flawlessly. I hope this helps someone else who is having a similar issue.
So I've determined that the sensor on the dash is bad. It operates when the sun is setting or rising, but when it's pitch black the lights won't turn on automatically. I figured this out when I was driving through shaded areas and the lights were turning on and off via the sensor. When I got home I switched the sensor out with my 2010 Ram and the suspect sensor took a long time to switch the lights on and off in the other truck. When I put the good sensor in the 2012, it worked flawlessly. I hope this helps someone else who is having a similar issue.