Ambient light sensor

RACERX7775 · April 2, 2019

Gottcha. Are the factory drl lower voltage that the actual low beams? I know my headlights come on and off all the time too. Especially since i have my windshield tinted. But like i said before, i have hid lights so they are full brightness all the time they are on.

daveor · April 2, 2019

no idea about the voltage, Tinted windshield would make your lights go off and on a lot for sure.

WS6FirebirdTA00 · November 9, 2019

Thanks DrPool!

I just did this was I was incredibly annoyed there are no settings for this and my interior light would dim at 3 or 4 PM when I still needed sunglasses - suuuuuuuuuuper annoying!

Sunset today in my area of NC is 5:20 PM. At 5:17 PM they came on after doing this mod. About the time I say lights inside should dim, they come on shortly after. I would rather them come on a tad late and off a tad early in auto.

I ordered a new sensor on Amazon for $10 shipped just in case I messed up. AC Delco D1540J/13578464 is the part number that worked on my 2018 Sierra. I removed all the goop, though a little was stuck to the circuit board and I just left it. Very little was on the sensing element.

wingsaa · December 14, 2019

So this does work well for the lighting. I did this for my windshield tint and it kept them from being on basically all the time. The only thing I would caution is it does seem to impact the automatic temperature climate control. This may be different from pickup to SUV but I can confirm that in my Yukon Denali this sensor is also part of the temperature sensor as well. I started to notice that the auto fan would be on more on cooler days after the truck would be sitting out and warmer in the vehicle vs actual outside temp. I believe the white goop in the sensor actually helps to control the rapid temp fluctuations. Think of it like skin or insulation. At any rate, I bought another sensor so I can have two... one with the gel and one w/o. I've gone lighter on the windshield tint and gone back to the stock sensor.

WS6FirebirdTA00 · December 14, 2019

Interesting point. It seems that could be part of the “sun load” logics from a quick search. I noticed the other day I had to bump up the heat when it was cool out. I had the sunroof open, so I assumed I got it too warm inside or too much heat on a sensor. I still don’t know where the actual temp sensor is, but seeing this post makes me wonder if it was due to the light sensor.