[Collin02]

Hey. Was wondering if anyone knew what these bulbs are? I cannot seem to get them to turn on...they may be burnt out, but what are they and which switch position do you need to be in for them to be on? Thanks!

 

[2000sierra]

Those lights are DRL , daylight running lights. I never touch my light switch so my lights are set in auto mode. They come on automatically and when the sensor detects that it is dark these turn off and my headlights switch on. Hope this helps. My truck is a 2000 GMC Sierra SLE. I’m sure your truck has the same option.

 

[RayVoy]

Only on if it is daylight (and the headlights are off) and the vehicle is in DRIVE

To test mine, I use a glass door, just drive up to it, check the reflection.

They are (at least in mine) only 3157 bulbs and burn out quickly.

I use 4114 bulbs, same base and have longer life

 

[xPosTech]

That's the advantage of using a 14 volt bulb instead of a 12 volt. The life of incandescent bulbs is cut in half for every volt higher than the bulb is rated for.

Ted

 

[Collin02]

Thanks for the responses. Does anyone know where the photocell sensor is that detects night vs day for auto headlights?

 

[2000sierra]

I believe its that small dark round looking thing in the center of the dash by the window. Bad explanation sorry.

 

[xPosTech]

That was fine. That's where it is.

Ted

 

[Collin02]

Oh. Well there is a hole there. It looks as if the previous owner pushed it down into the dash.

 

[xPosTech]

Some have had room enough with pulling the radio and bezel to get it back up.

Ted

 

[geo1]

Yep,41's for bulbs,8 years,still going, probably just jinxed myself

 

[Collin02]

Does anyone have any advice for getting the photocell for the AUTO lights out of the dash?

 

[2000sierra]

Yep,41's for bulbs,8 years,still going, probably just jinxed myself

Is that headlight bulb's low or high and 8 years? 41's?

 

[Collin02]

He’s running them as DRLs because they last longer.

Is that headlight bulb's low or high and 8 years? 41's?

 

[xPosTech]

Does anyone have any advice for getting the photocell for the AUTO lights out of the dash?

Some have had room enough with pulling the radio and bezel to get it back up.

Ted

It's easier than pulling the dash.

Ted

 

[jasons99hoe]

Only on if it is daylight (and the headlights are off) and the vehicle is in DRIVE

To test mine, I use a glass door, just drive up to it, check the reflection.

They are (at least in mine) only 3157 bulbs and burn out quickly.

I use 4114 bulbs, same base and have longer life

im gonna try this. thanks ray i had no idea. ( the bulb life deal) i dont have drl's

 

[RayVoy]

Does anyone have any advice for getting the photocell for the AUTO lights out of the dash?

I haven't had to remove from current truck, but in the past, lifting the dash strip that is against the windshield always provided access