Disable daytime running lights on a VW Passat TDI or VW Jetta TDI

Apr 18, 2017
Disable daytime running lights on a VW Passat TDI or VW Jetta TDI
  • How to disable daytime running lights on a VW Passat TDI or VW Jetta TDI
    Difficulty: 1/5

    Introduction

    This article shows how to disable the daylight running lights (DRL).
    If you have the cold start chirp, disabling the daytime running lights will help take the load off the alternator and somewhat reduce the likelihood of the cold start chirp. The cold start chirp is most likely caused by a worn harmonic balancer pulley. See 1000q: cold start chirp fix to see possible solutions and more details. DRL helps visibility to others so I suggest leaving it active for normal driving.

    Warning: Do not disable the DRL if it's illegal where you live or operate the car. By disabling the DRL, you take full responsibility for your actions to you or any third party. See the TOS Agreement for the full legal disclaimer.

    Procedure (passat)
    Open the hood and find the DRL plug. Unplug it, that's it! I suggest taping it in place.

    General location under the hood marked with a green arrow. While you are here, also check the relay box to the left with the red wire and clear plastic cover. It's the coolant glow plug relay and is commonly burnt out. Clean the corrosion off the wire connectors and replace the fuse if it's burnt out. It can cause a fire hazard from overheating if there is a lot of corrosion on the wires.

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    Close up of the plug. It has a yellow wire. Just squeeze the metal clip with your fingers and you can pull the plugs off.

    [​IMG]

    Procedure (Jetta)
    If your DRL turns off when you pull the handbrake, find relay 173 underneath the dash and remove it. You could also disable the DRL at pin 15 on the headlight switch. Use some thin feelers or spark plug gappers to feel around the headlight switch trim and release the latch. A screwdriver can damage the trim. Remove the light switch and pull the yellow wire's pin (instead of cutting the wire) but the relay solution is faster and less likely to damage the pin or trim. The yellow wire is pin 15. Use electrical tape over the exposed pin or wire.

    Also check the relay box to the left with the red wire and clear plastic cover. It's the coolant glow plug relay and is commonly burnt out. Clean the corrosion off the wire connectors and replace the fuse if it's burnt out. It can cause a fire hazard from overheating if there is a lot of corrosion on the wires.