Daytime running lights not working?

Tiny
TYART1ST
  • MEMBER
  • 2017 VOLKSWAGEN JETTA
  • 56,552 MILES
My car listed above S model has a dim left daytime running light and Volkswagen is quoting me $700.00 to fix. Is there a fuse related to the lights? This model has the strip light on the bottom of the headlight fixture.
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Tuesday, March 23rd, 2021 AT 2:59 PM

5 Replies

Tiny
KEN
  • ADMIN
Chances are it need the new headlight module for the left side that is dim, there is no individual fuse for the DRL is it controlled through the headlight module. Here is directions on how to replace it so you can save some money. See if they sell the power stage that should fix it, if not you need the headlamp module. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Thursday, March 25th, 2021 AT 11:26 AM
Tiny
VW4EVER+
  • MEMBER
  • 2015 VOLKSWAGEN JETTA
  • AUTOMATIC
  • 40,000 MILES
One of my DRL's went out (driver side), so I replaced the bulb, but it is still not working. Thought maybe I was sold a bad bulb so I tried another new one, but still nothing. Then I tried swapping the socket pieces to see if maybe that piece was faulty, but still the same result (the new bulb+socket part work when inserted on the passenger side). What could be the cause of DRL not working even after changing bulb? Thank you so much.
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Tuesday, April 13th, 2021 AT 9:49 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

Does the right side work? If it does, then we need to check for power at the light socket. You can do this with a test light. First, here are a few links that show how to use basic testing equipment:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Now, I attached a picture below of the light in question. I need you to check if there is power to the blue wire in the pic. Then, I need you to check if there is continuity to ground to the other wire. If you find there is power to the blue wire, then the problem is no ground because you already tried a different light socket.

If there is no power to the blue wire, then we need to trace it back to the power supply, the control module behind fuse panel C.

Actually, if I was doing this and found no power, I would first check the control module first to see if that is where the problem is. If there is power there, then I would know the wire between that point and the light is bad. Now, the reason I asked if the right one works is because power also comes from the control module. If you look at pic 2, I circled both power supplies to the left and right. Sorry for the sloppy letters.

Check for power and let me know what you find. Also, if you have other questions or need help, let me know.

Joe
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Tuesday, April 13th, 2021 AT 9:49 AM (Merged)
Tiny
CAH1325
  • MEMBER
  • 2012 VOLKSWAGEN JETTA
  • 2.5L
  • 5 CYL
  • 2WD
  • AUTOMATIC
  • 119,000 MILES
On the driver side no DRL's has power to the headlight DRL or the tail light DRL's. I've changed the bulbs and both the boards work if plugged into the passenger side but neither tail light board DRL works on the driver side. I've tried testing all the fused with a test light and I can't find a blown fuse in the cabin or under the hood. I don't know what else to check.
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Tuesday, April 13th, 2021 AT 9:50 AM (Merged)
Tiny
KEN
  • ADMIN
It sounds like the vehicle system electronic control module is out here are the headlight and DRL wiring diagrams so you can see how the system works and the module replacement instructions as well. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Tuesday, April 13th, 2021 AT 9:50 AM (Merged)

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