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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old November 17th, 2019, 15:26   #1
matgat
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Default Replaced brake light switch and fuse 13, still coding with bad switch

Hi guys, I just replaced my brake light switch and changed fuse 13, my brake lights are now working but the glow plug light is still flashing and when I scan with my VAGCOM, it still gives me a bad brake light switch.


Any idea what's wrong?
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Old November 17th, 2019, 23:57   #2
STDOUBT
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Did you try just clearing the code?
Some codes go away on their own after so many miles, too.
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Old November 18th, 2019, 13:23   #3
matgat
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Quote:
Originally Posted by STDOUBT View Post
Did you try just clearing the code?
Some codes go away on their own after so many miles, too.

Yes I tried, many times. I keeps coming back.


Today it stopped and came back later on !
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Old November 18th, 2019, 13:58   #4
Nero Morg
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What exactly is the code?
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Old November 18th, 2019, 19:27   #5
matgat
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What exactly is the code?

I don't have the exact fault message from VCDS but it's:
Brake Light Switch (F): Implausible Signal
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Old November 19th, 2019, 03:32   #6
Tdijarhead
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This one?

http://wiki.ross-tech.com/wiki/index...5/P0571/001393
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Old November 19th, 2019, 06:19   #7
matgat
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Yup!!
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Old November 19th, 2019, 10:52   #8
BobnOH
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First thing in the wiki-
Possible Causes

  • Wiring and/or Connectors faulty
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Old November 22nd, 2019, 08:43   #9
Skimaster
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I just went through this. My solution was fuse 43 was missing. But that seems to be uncommon.

More common fixes are fixing brake light bulbs that went out, and making sure you have the right bulbs in the tail light.

Ensuring proper function of the switch with a multimeter. One red wire gets 12v and the other connects to it when the brake is pressed. The white wires are connected when the brake is released, and disconnected when the pedal is pressed.

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