Drivers side DRL issue

[mtudb24]

Noticed tonight that my drivers side DRL bulb doesn't work and neither does my quadratec pre-runner lights that plug into the drivers side fender light harness. Haven't had the chance to pull anything apart yet, but looking in my owners manual, I couldn't find any DRL fuses anywhere. I doubt its a fuse since the passenger side DRL works.
First thought is that it could be the "T" joint where the Q-tech grille lights plug in at the fender but then I would suspect that the blinkers and running lights wouldn't work, but they do.
I'm wondering if the DRL bub blew, would that also cause the grille lights not to work? I don't think so since power to the grille lights is upstream on the DRL bulb.

Any thoughts?
Thanks

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[grein46087]

You May need to check that 6 pin connector behind the inner fender liner and see if it is seated correctly. Now a Question here, how did you connect that Quadratec lights, they normally fuse lights. If there is not a bad fuse. Check the bulbs, not sure if you are doing the halogen or LED. maybe replac with the canbus ready LEDs so no error codes are awarded. Short of that, you may be probing with a test light and multimeter.

 

[mtudb24]

You May need to check that 6 pin connector behind the inner fender liner and see if it is seated correctly. Now a Question here, how did you connect that Quadratec lights, they normally fuse lights. If there is not a bad fuse. Check the bulbs, not sure if you are doing the halogen or LED. maybe replac with the canbus ready LEDs so no error codes are awarded. Short of that, you may be probing with a test light and multimeter.

The Quadartech lights are plug and play with that 6 way connector on the drivers side. so no splicing no fusing ect.
pulled the T connection out today and all pins look good. The side marker and turn signal lights still work as function.

Thought I had a couple extra 7443 bulbs laying around but did not. Will replace DRL bulb tomorrow. Running the haogen set up but with Silverstars in the DRL's. Been fine since 2020 when i installed this system. Not exactly sure when they stopped working but its been without the last week or 2.

If the bulb isn't it, then yeah, probing and tracing down a potential open circuit.

I still don't see anything in the fuse block to tell me where the DRL's get their power from? I see 3 large fuses that say EXT lighting, but no idea which each of goes to what. And I'm sure they don't fuse each DRL separately. But maybe I'm wrong. Passenger side DRL is fine.

 

[grein46087]

I believe the drls are on a relay which can be fused also

 

[yoda13]

Mine started doing this…just turned the DRL off…

 

[mtudb24]

Mine started doing this…just turned the DRL off…

I honestly don't care about the DRL's but I want my grille pre-runner lights to work. So not sure why or what would cause them to not turn on when everything on the drivers side (blinkers, running lights etc) work but not the DRL bulb. Hoping its something stupid like a bad DRL bulb.

 

[yoda13]

I honestly don't care about the DRL's but I want my grille pre-runner lights to work. So not sure why or what would cause them to not turn on when everything on the drivers side (blinkers, running lights etc) work but not the DRL bulb. Hoping its something stupid like a bad DRL bulb.

I hope so too!

 

[mtudb24]

Update: Ended up replacing the DRL bulb with no luck. So the problem definitely lies in the Q tech harness someplace. Pulled the Q tech harness out and installed a new one today. Everything now works again.

However, when I did a pin to pin continuity check between the 2 connectors and all 3 LED bulbs back to the inline's in the harness, I found no short nor any open circuits. Everything has continuity from each bulb back to the inline connectors. So I have no idea on why this harness failed or was causing my drivers side DRL to quit working. I plugged and unplugged multiple times to make sure the connectors were fully seated and even the CPA's were engaged so I know it was tight.

The Q tech harness comes with a 3 year warranty but of course I was out of it by about 7 months. BALLZ.

Oh well, out $50 bucks but everything is working again as it should. Just bothers me that I can't track down the failure.

 

[jpfeif34]

Mine started doing this…just turned the DRL off…

What year is your gladiator? I have a 22 and have a drl option in my settings but nothings happens when I check or uncheck the box

 

[yoda13]

2021

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