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    Thread: Reverse Light Switch - mystery solved! (DIY included, manual transmission)

    1. 11-28-2006 12:25 AM #1
      So I found a lot of questions, a few answers, and zero clear pictures regarding the notorious reverse light switch, which has a tendency to fail on MkIVs, leaving us with no back-up lights. Finally after digging around in my car three times, and four trips to the dealer, I got the right part and got my backups working again. (Woo!) Behold, the DIY:

      (nondisclaimer goes here)

      0. First, you gotta get the part itself: 02K 945 415 C. The diagram in the parts selector is confusing cause (a) there's no sealing washer and (b) the diagram of the transmission is almost completely wrong. But that's the part you need.

      [[Had to remove the picture]]

      Tools required: nicely enough, all I needed for the whole affair was (I think) a 10mm bit and a 12mm bit, plus pliers for the air filter tubes and a wrench for the switch itself.

      1. Open hood, let engine cool down, remove battery cover.

      2. Remove battery terminals and the cable to the fusebox (or whatever it's called). Then remove the stuff around the battery, including 10mm bolts that hold the battery "box" in place. Also give yourself some room by removing the back covers to the driver side headlight. Finally, remove the restraining piece that holds the battery in place (12mm bolt) and get the battery out of there.

      3. The back of the battery box is a separate piece that clips to the front part. It's held in by two 10mm bolts. Plus the cables to the fuse box run down the back and are held in place by a clippy piece that folds over. It's surprisingly hard to unclip!

      4. Just keep the fuse box dangling there. Now you've got a clear shot to the battery base, a big plastic piece held in by four 10mm bolts (one already removed here).

      5. Alright, almost time for business! The upside-down golf club piece is your shift linkage, and it's bolted to the top of the transmission.

      6. Zoom in a little closer... see under all those cables?

      7. <flash on> Bing! There she is:

      8. Disconnect the switch plug. There's a tab on the end you gotta pull.

      9. Now you're ready to unscrew the switch. Except! You don't have enough room to turn the wrench. So you gotta pull the air filter box too. Here it is:

      It's held in by two bolts and rubber gaskets, which oddly just popped out for me. On the driver's side the filter connects to the air intake and has a little support that holds it in place. On the passenger side it connects to two air outtake tubes (big and little) and the airflow sensor. A better look:

      Pull off the tubes and pull the airbox out of the car. Ahh, now there's some room to wiggle.

      10. Even now, it's a tight squeeze to get at the reverse switch and unscrew it. This would be a perfect time for a self-ratcheting wrench, but the reverse light switch is like 1 millimeter bigger than my largest one. So instead, I grabbed an open-ended wrench and managed to turn it 1/6 turn at a time:

      11. Done! Old, meet new:

      Installation is the reverse of removal, as the manual says.

      Voila! I would have taken a picture of my reverse lights working, but I was alone and - think about it - that's kinda hard to do.

      Let me know if I got something wrong. Hope this clears it up for some people!


      Modified by happywaffle at 2:10 PM 3-16-2007


    2. Member esoteric vue's Avatar
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      11-28-2006 12:45 AM #2
      A for effort on the DIY. i would see how this'd be very helpful.

    3. Banned ItDiesToday's Avatar
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      11-28-2006 12:50 AM #3
      Quote, originally posted by happywaffle »
      Voila! I would have taken a picture of my reverse lights working, but I was alone and - think about it - that's kinda hard to do.

      Let me know if I got something wrong. Hope this clears it up for some people!

      Haha I just pictured a reverse "ghost ride da whip" in my mind....funny stuff.

      I need to get my friend to fix this on his GTI.....it caused a lot of problems the other day when I borrowed his car....I couldn't figure out why no one in back of me would move when I was in reverse.


    4. 11-28-2006 12:53 AM #4
      adjustable wrenches should be left in the plumbing tool box!

    5. 11-28-2006 12:58 AM #5
      i'm saving this one just in case i need it later on nice job .

    6. 11-28-2006 01:02 AM #6
      great diy. thanks.

      PS doesnt the reverse light come on even if the car is off? (mine does )


    7. Member E CODE's Avatar
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      11-28-2006 01:44 AM #7
      Quote, originally posted by reflexboosted »
      PS doesnt the reverse light come on even if the car is off? (mine does )

      Not quite - you need to turn the key one position....anyway - great DIY - also useful for a good place to wire up a reverse signal for navi installs

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    8. 11-28-2006 01:45 AM #8
      i may be pwnt... ill investigate tomorrow. i thought for sure it did

    9. 02-28-2007 04:26 PM #9
      hey this shows a differ part...... similar to the one in the diagram but its the color "PURPLE"
      part number 1J0 945 511 E............ I will post a pic to....... do I have the right part?? vw dealer said so.......




      Modified by Phinatik at 12:39 PM 2-28-2007


    10. 03-09-2007 05:44 PM #10
      Quote, originally posted by Phinatik »
      hey this shows a differ part...... similar to the one in the diagram but its the color "PURPLE"
      part number 1J0 945 511 E............ I will post a pic to....... do I have the right part?? vw dealer said so.......

      Sorry! This got off my email notification list.

      That looks nothing like the part I used, as you can see! That's for a manual MkIV, right? I guess it could stick in there hypothetically...


    11. Member MikeWire's Avatar
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      03-09-2007 07:24 PM #11
      Quote, originally posted by Phinatik »
      hey this shows a differ part...... similar to the one in the diagram but its the color "PURPLE"
      part number 1J0 945 511 E............ I will post a pic to....... do I have the right part?? vw dealer said so.......


      Modified by Phinatik at 12:39 PM 2-28-2007

      That's because it's not the same part...the picture is a brake light switch, not the reverse switch.

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      03-09-2007 08:46 PM #12
      Nice DIY... but can't you slide under the car and reach it? It'd save you steps 1-19
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    13. Member biggestmuff's Avatar
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      03-10-2007 05:06 PM #13
      what is the VW parts selector? ETKA?

    14. 03-16-2007 10:13 AM #14
      Yeah, ETKA is the VW parts selector application. (They just made me pull the screenshot cause it's copyrighted.) Just go by the picture and the part number and you should be okay.

    15. 11-28-2008 04:00 PM #15
      i know im bringing back a dead thread but my switch in that spot looks nothing like that i have a 1999.5 mk4 golf with a stick so does that give me a different part? thanks

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      11-28-2008 08:29 PM #16
      Quote, originally posted by nightwing940 »
      i know im bringing back a dead thread but my switch in that spot looks nothing like that i have a 1999.5 mk4 golf with a stick so does that give me a different part? thanks

      You may need a MKIII part if it is a very early MKIV.

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    17. 11-29-2008 12:23 AM #17
      Quote, originally posted by FaelinGL »

      You may need a MKIII part if it is a very early MKIV.

      Mike


      Exactly. I had the same issue in my 00 Jetta.

      TDI for the win !!!!!!!!!!!!!!

    18. Member J@H Dub 1.8t's Avatar
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      12-05-2008 11:48 AM #18
      all I can say is thank you for this DIY. you all dont know how I hate backing up and cars are still flying by cuz my reverse lights dont know. Thank god I never got hit backing up but still. Im on my way to stealership now to pick one up. thanks again and good write up

    19. 01-07-2009 12:37 PM #19
      will removing the car battery lock my radio? i bought the car used and was never given the unlock code.

    20. 01-17-2009 01:16 PM #20
      Will this part number be fore the 6 speed trannies to?

    21. Member Jay-Bee's Avatar
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      01-17-2009 01:38 PM #21
      I thought my switch was dead, so I picked up a new one, I was getting my R32/TT LCA bushings done the other day at a shop and decided to have him do the switch at the same time since it's so effing cold here right now.

      Turns out my switch was fine, it was the electrical connector that was messes, so picked up a new one from the dealer and had him throw it on, 7.50$ for it and the guy pretty much did it for free after finishing my bushings and since I bought my switch from them I was able to return it and get my 30$ back

      Just throwing this out there if some people end up replacing their switch and it still doesn't work.

      Quote Originally Posted by Fritz27 View Post
      I read this in Samuel L. Jackson's voice to make it more interesting. That's all I got.
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    22. 01-24-2009 07:57 PM #22
      I hope someone can help me--I'm trying to find the location of this switch on a 2002 TDI jetta automatic. My engine compartment obviously looks nothing like the one in the fantastic writeup above. I've looked, but have had no luck finding this switch. Can someone help?

    23. 01-25-2009 01:30 AM #23
      anyone? beginning to wonder if I even bought the correct switch...

    24. Member theguysmiley's Avatar
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      01-25-2009 03:47 AM #24
      Thank you VERY much for posting this. My reverse light switch crapped out on my over the summer, and after 3 trips to the dealer chasing the wrong part number, I finally gave up. You have inspired me to finally get my dang reverse lights working again.
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    25. Member Wyman's Avatar
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      01-25-2009 09:10 AM #25
      great DIY. This will def. come in handy..
      PVW 2/10

    26. 01-27-2009 02:17 AM #26
      TY for this great DIY.

    27. 02-03-2009 03:14 PM #27
      Another big thanks for putting this DIY together.

      FWIW, here is what my dealer told me when I went seeking the part.

      "Hi, I have the back up lamp switch in stock. The part number you supplied actually supercedes to a 02k94415G and it goes for $23.91+ tax. It will absolutely work in your 01 jetta. In january of 05, the 415c superceded to a 415e which then superceded to the 415G in january of 06."


    28. 02-09-2009 10:47 PM #28
      Can someone tell me which colour wire goes with which number on the clip that goes on the reverse light switch?
      Thanks.

    29. 04-07-2009 03:26 PM #29
      thanks much happywaffle!

      this thread has been very helpful, my reverse lights have been broken ever since I bought the car and this ended up being the cause of it:


      connector broke completely off

      just ordered a new one from the stealership!


    30. 05-24-2009 01:29 AM #30
      I have an Audi A4 B6 with the same issue, does anyone know where the switch is or how to fix this issue with the Audi? Thanks!

    31. 05-04-2010 05:25 PM #31

    32. 10-01-2010 11:57 PM #32
      hello guys my reverse switch did not have anything plugged into it when i bought the car. and there is alot of loose wires under the hood what colors are the wires that plug into the reverse switch please text or email me with the answer


      wowrbooher@gmail.com


      724 561 8326


      text is better please!
      thank you!

    33. n00b
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      10-03-2010 08:14 PM #33
      Thanks for the post. I was almost done mine when I decided to play around with the old one. I removed it, sprayed the hell out of it with WD40 ( love this stuff ) and played around with the contact. After a few minutes of spraying and toggling the switch, I tested it and it worked just fine (for now). Not saying it will work for everyone, but its worth a try.

    34. Member Jay$75vwproj's Avatar
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      10-25-2010 01:52 AM #34
      Great write up.... So my question is... I checked fuses (good), I checked bulbs (good), and I replaced reverse light switch (new)... Still no Reverse lights.... looked everywhere for whats is next can someone help me.
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      11-06-2010 07:27 PM #35
      What's the best way to test a switch? Simple resistance test when engaged?


      Quote Originally Posted by Jay$75vwproj View Post
      Great write up.... So my question is... I checked fuses (good), I checked bulbs (good), and I replaced reverse light switch (new)... Still no Reverse lights.... looked everywhere for whats is next can someone help me.
      Did you check for voltage at the connector? Should be around +12v when in reverse.
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