Hello all. I tried the search feature but found nothing on this subject,so her goes.My friends '02 350 Crew Duelly has the "auto on" headlight feature.Recently they began turning themselves on then off intermittently.He was able to overcome this problem by manually using the headlight switch.Now,at night, when his headlights reflect off a sign or whatever they will turn off momentarily.1 mechanic says headlight switch, another says its the day/night sensor.?? Suggestions?
Thanks,Mike

 

check the sensor

 

Is this thing hard to get to to replace? What about cost? Lastly, whats the "official" name for this sensor?
Thanks