Brake light issues

Discussion in 'Mech Tech' started by Bluebelle, May 3, 2017.

  1. 77 Westy

    77 Westy Supporter

    snotty likes this.
  2. 77 Westy

    77 Westy Supporter

    A very good question – I have no idea what the holes are for, you can stick your finger in the big one but the little one is too small.:)
     
    snotty likes this.
  3. Are they not needed then I wonder? These panels are made to order so you could specify not having the holes. Thinking of getting one.
     
  4. 77 Westy

    77 Westy Supporter

    If they’re needed I don’t know what for but it’ll probably cost more to have one made without the holes. Hole deletion is very expensive you know. ;)
     
    snotty likes this.
  5. Letting water out.
     
    77 Westy likes this.
  6. 77 Westy

    77 Westy Supporter

    That’s the best reason for the holes so far. Coarse water escapes through the big hole and fine water through the little hole?
     
  7. Did the new switch solve the issue? I ask as I am having the exact same issue at the moment.

    Pete
     
  8. Razzyh

    Razzyh Supporter

    Stick a cable between the pins. If lights work then it’s likely the switch
     
    Neptuneblue likes this.
  9. Flakey

    Flakey Supporter

  10. 77 Westy

    77 Westy Supporter

    No hydraulic switch can eliminate the delay in the brake lights coming on. The switch can only operate when there is pressure in the master cylinder and when there is pressure the brakes are already on.
     
    Last edited: Oct 26, 2017
    Neptuneblue likes this.
  11. Actually I seemed to sort the issue by topping up the brake fluid. The theory being that the switch works on pressure so more fluid more pressure. Seems to be ok at the moment.
     
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  12. 77 Westy

    77 Westy Supporter

    ^Correct
    ^Wrong – unless the reservoir was empty.
     
    Lasty and Babble like this.
  13. ^this
     
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  14. Well it must have been a bit low. Solved my issue at any rate. :)
     
    snotty likes this.
  15. 77 Westy

    77 Westy Supporter

    A bit low wouldn’t be low enough; the reservoir would need to be empty and the brakes inoperative. Adding fluid did not solve the problem, it was something else.
    The pressure to operate the hydraulic switch comes from your foot pressing the pedal. Maybe you’ve been working out and you pressed the pedal harder than usual.:)
     
  16. I had exactly the same issue and it was solved by 2 new 3 pin brake light switches. Ultimately they work by pressure and if your brakes are bled, working and stopping the van and the switch only works when very strong pressure is applied then it has got to be the switch.

    Sent from my F3111 using Tapatalk
     
    Babble and snotty like this.
  17. Yeap, I agree with that, thanks for the reply.:thumbsup:
    Trouble is, both sets of brand new switches leaked (VWH and GSF 'coz i was desperate).
    One set from between the metal and plastic, and the other set leaked from all over - yes it was torqued up correctly to 14 lbs.
    So I'm back with the original vw switches - no leaks but no brake lights without hard press.:(
     
    NickG likes this.

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