2004 Yukon Daylight Running Lamps (DRL)

[JochenWoern]

The DRL's on my Yukon no longer function. I changed the bulbs and checked the fuse, still nothing.

The bulb sockets look pretty dark and somewhat burnt, read online that one needs to add new sockets at times in order to make the DRL work again.

- Is this what you guys would recommend as well?
- If yes, what is a good source to purchase these bulb sockets?

As always, many thanks for the help. HAPPY 4th!

 

[MassHoe04]

NAPA carries Echlin brand, which are generally good. $26 each.

https://www.napaonline.com/en/p/ECHLS6606?impressionRank=1

They are doing their bucket sale this weekend for 20% off 3 items.

You could replace for less than $45.
Buy a 10 cent washer for the third item...

I did not replace sockets on my 04 Z71, but I did need bulbs. Rather than the high current from standard bulbs, I replaced with LED. Even though the package says "off-road use only", I don't think I'll have an issue with RMV inspection. How can DRL lights be too bright, right?
I have a set of standard bulbs, just in case, but I think I will be passed without any problems. I figured the LED draws so little power, it would be better than continuing to toast the DRL sockets.

https://www.napaonline.com/en/p/LMPBP3157LEDN?impressionRank=1

 

[JochenWoern]

So asking the question again, the socket going bad is a common occurrence and replacing it is the way to go?

 

[Fless]

So asking the question again, the socket going bad is a common occurrence and replacing it is the way to go?

You tested the voltage at the sockets with the key on engine off (KOEO) and the shifter in Drive? (Wheels chocked.)

If you have voltage at the (clean) sockets under those conditions, you may be able to slightly bend the wire contact on the bulbs for a better connection. And, yes, the sockets are a common failure point.

 

[JochenWoern]

Thanks very much.

 

[MassHoe04]

FYI - the LED replacements are only 2 watts. Standard 3157 bulbs are almost 27 watts!

 

[JochenWoern]

Bought new GM sockets as well as LED Bulbs and installed one side today. STILL NOTHING!

Fuse is good, what's next to check? The FUSE RELAY under the Hood?

Thanks for the help guys.

 

[Jimmyy]

Key on and in gear?

 

[JochenWoern]

YES!

 

[DirtDigler]

Some LED's are polarity sensitive just so you know, once you get power restored.

 

[JochenWoern]

Understood, thanks. At this point I am still waiting for suggestions in regards to my power issue.

 

[Fless]

I would swap the relay with a known good one that's the same style (believe the A/C relay is the same). With the relay out, though, is there voltage to the relay socket? I'm not quite sure which terminal to check as I don't have a wiring diagram.

 

[JochenWoern]

Some LED's are polarity sensitive just so you know, once you get power restored.

Thanks again.

 

[JochenWoern]

I would swap the relay with a known good one that's the same style (believe the A/C relay is the same). With the relay out, though, is there voltage to the relay socket? I'm not quite sure which terminal to check as I don't have a wiring diagram.

Tried that just now, unfortunately no change. Still no power.

There is only the 10Amp Fuse and the relay under the hood for the DRL's, correct? Or am I missing a fuse somewhere else?

Guess I will need to take the truck to have the Pros figure it out?

 

[Fless]

Do your automatic headlights work, by that I mean do they come on automatically when it's dark enough or the sensor on top of the dash is covered?

 

[JochenWoern]

Do your automatic headlights work, by that I mean do they come on automatically when it's dark enough or the sensor on top of the dash is covered?

Yes, they do come on.

On second thought, now I am thinking that they are on when it is bright outside, as I mentioned the other day that I thought the headlights were on when the wife came home from shopping in bright daylight. Which would mean the DRL's are obviously not coming on when the headlights are on.

Is maybe the sensor the culprit? I have a dashmat up there, may it is obstructing the sensor?

Am I correct in regards to the fuse and relay?

Thanks.

 

[MassHoe04]

Yes, they do come on.

On second thought, now I am thinking that they are on when it is bright outside, as I mentioned the other day that I thought the headlights were on when the wife came home from shopping in bright daylight. Which would mean the DRL's are obviously not coming on when the headlights are on.

Is maybe the sensor the culprit? I have a dashmat up there, may it is obstructing the sensor?

Am I correct in regards to the fuse and relay?

Thanks.

Dash sensor does need to be kept clear. That sounds like it might be a reasonable explanation for lights on in daytime and no DTRL...

Keep us posted.