We all know by now that the auto light sensor brings the lights on early and slow to go off but I seem to be driving all morning with mine on after early morning start. Then in the afternoon, they came on under a railway bridge but then stayed on.
Mine are behaving as if it is a latching relay? Once on stays on; resets when ignition turned off.
Returning home in the light, I got my Maglite out of the glovebox and put it right on the sensor but the headlights did not go out.

Am I alone? Is this a trip to the dealer? Gone... 2013 XS TD4 Manual Firenze Red
Gone... 2008 (09MY) XS Td4 Manual Stornaway Grey
Prior... 2003 G4 Discovery 2, 1998 Disco 1 and 1997 Disco 1 Company car before that
Also gone in Nov'13, after 7.5 yrs, to new owners with time for more TLC - 1980 Series III 88
Current 2015 Discovery Sport HSE 2.0

Mine exhibit the same symptoms, stay on when the sun is low but bright.
The sensor may be receptive to certain wavelengths, ie not artificial lights, bright street lighting would have the lights going out.

Good point. I'll try again with an LED torch and see what happens Gone... 2013 XS TD4 Manual Firenze Red
Gone... 2008 (09MY) XS Td4 Manual Stornaway Grey
Prior... 2003 G4 Discovery 2, 1998 Disco 1 and 1997 Disco 1 Company car before that
Also gone in Nov'13, after 7.5 yrs, to new owners with time for more TLC - 1980 Series III 88
Current 2015 Discovery Sport HSE 2.0

Im sure its been asked before but where is the sensor for the lights I also noticed the lights staying on half the morning

Nick

Nick, The sensor is behind the interior mirror

There also stay on in bright foggy weather too plus low bright sun light.

Last edited by dunroof on 16th Feb 2013 8:14 am. Edited 1 time in total

Sensor turns lights on/off with LED torch pressed up to the sensor so it's all working OK but the light level to turn OFF is a bit high. Again this week I seem to be driving with ights on all the time but, with a grey car, that may not be a bad idea in place of DRLs!!!  Gone... 2013 XS TD4 Manual Firenze Red
Gone... 2008 (09MY) XS Td4 Manual Stornaway Grey
Prior... 2003 G4 Discovery 2, 1998 Disco 1 and 1997 Disco 1 Company car before that
Also gone in Nov'13, after 7.5 yrs, to new owners with time for more TLC - 1980 Series III 88
Current 2015 Discovery Sport HSE 2.0