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  1. #1
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    Default How to: Modify B13 fixed intermittent wipers to variable intermittent

    Before I get into anything instructional, if you do not know how to solder and/or have basic knowledge of electronics this mod may not be for you. In fact, even if you can handle this you may want to hit the junk yard and get a couple wiper switches to practice on.

    I will not be held responsible if you ruin your shit, mmmkay?

    BTW, this was done on a non-airbag B13. I can't say for sure what may or may not be different, but if you have an airbag this mod may not apply.

    Go to Radio Shack and get:

    10K Ohm 1/4-Watt Carbon Film Resistor (5-Pack) : Resistors | RadioShack.com

    100K Dual-Ganged Stereo Volume Control - RadioShack.com (Actually any 100k ohm potentiometer will work. This one happened to be the smallest RS had.)

    Control Knob : Control Knobs | RadioShack.com


    1- Remove your steering column shroud
    2- Remove your steering wheel
    3- Unplug headlight/turn signal switch, wiper switch and cruise control if you have it
    4- Three screws hold the switch body to the steering column, unscrew them and take the switch body to the nearest work bench



    5- Turn switch over and locate four screws that hold the circuit board




    6- Remove the screws and carefully lift board away from the switch body. Leave switch body upside down and move it to a safe place.

    7- Turn circuit board over



    8- Next to the black box you'll find a single, 36k ohm resistor. This resistor is responsible for the standard 5-6 second delay, it's location is responsible for the fixed delay. Unsolder and remove this resistor....




    9- Directly to the left of the resistor you just removed will go a 10k ohm resistor. The lower value will drop delay to 2 seconds and the move to the left will unlock the magical variable function...




    Please push the resistor all the way through and trim the leads off the bottom. That is a pic of one of my test boards.

    10- There are two pads on the back of the board. Cut a length of speaker wire and solder to these two pads. Thinner wire will be easier to work with...




    11- I mounted the volume control here...





    12- The speaker wire you soldered to the two pads on the back of the board will go to these terminals. The two I connected to are noted in this next pic, but depending on how you mount your volume control it may be different for you. One wire will always go to the center terminal, that is certain...



    13- Put your car back together and enjoy the mod...




    I'm still working on this. I've tried a couple adjustable stalks, one from an early Maxima and one from an early Altima but they didn't work. I believe this is due to the fact that their "value" is not compatible with the circuit board.

    I will keep adding to/changing this as I make further progress.
    Last edited by SE-RMonkey; 05-15-12 at 05:30 PM.

  2. #2
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    Here's the thread were I figured this all out: B13 variable intermittent wiper mod? YES!

  3. #3
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    Default

    Mods, should this be in the "How to" section?

  4. #4
    neew kid on the block
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    Default

    why do this?
    b13. Trashed.

  5. #5
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    Quote Originally Posted by ga16eats View Post
    why do this?
    Ever have a car with variable intermittent wipers?

  6. #6
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    Excellent job!

    Quote Originally Posted by ga16eats View Post
    why do this?
    You're going to shit on this thread? Seriously?

    C
    cogito ergo zoom................
    1994 SE-R / DE+GT2560R / S4 / Nismo LSD / Calum Realtime/ 15x7 RPF1 / Hyperco - AGX. Just about stock.
    1995 Turbo Miata R Package / GT2560R NA is best, Bro / VVT engine /Megasquirt / Flyin Miata suspension / 15x8 949 6UL

  7. #7
    neew kid on the block
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    How the fuck am i shitting on this thread???? It was a simple question. I was just curious.... Is it like a cool factor thing or replacing something nissan messed up. And ive never had a car with them. Is it better than stock?? It seems like a cool idea.

    Pat
    b13. Trashed.

  8. #8
    Est. 2003 - Grade A Beef
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    It is better than stock.

    Great How To!
    Manny
    Unretirement phase 2...

    Manny's '95 Bfourteen
    SR20DEEP

  9. #9
    Member
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    Quote Originally Posted by ga16eats View Post
    why do this?

    Serious with the question?

    this guy put so much time on this and just share the knowledge for free.

    so any idea about this is so much appreciated.

  10. #10
    The People's Mod
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    Added to the manifesto. Great job.

  11. #11
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    Quote Originally Posted by ga16eats View Post
    How the fuck am i shitting on this thread???? It was a simple question. I was just curious.... Is it like a cool factor thing or replacing something nissan messed up. And ive never had a car with them. Is it better than stock?? It seems like a cool idea.

    Pat
    If you ever had variable, you'd know. This mod is 50% cool factor, 100% better than stock and 278.24% cool idea. Japan and the Philippines got variable intermittent, but the US didn't... What's up with that?

    Once I find a stalk that's compatible the conversion will be "OEM style" complete. As I stated from the very beginning... I'm on a mission, like a boss.

  12. #12
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    P10s have it built into the column arm and they have a knob on the end, i wonder if it can be a direct swap without modifying anything. it is a definite benefit because depending on level of rain, you can adjust, i usually never go into the slow or high modes when we do have rain.
    93 NX2K
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    GregM on G20.NET

  13. #13
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    Quote Originally Posted by azHkilrNX2K View Post
    P10s have it built into the column arm and they have a knob on the end, i wonder if it can be a direct swap without modifying anything. it is a definite benefit because depending on level of rain, you can adjust, i usually never go into the slow or high modes when we do have rain.
    Nope. Been there, tried that. P10's use a completely different set-up and run the delay through the "time control unit", not an amplifier as the B13 does. Also, the P10 switch body is completely different as compared to the B13.

  14. #14
    Egg Basket empty no more!
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    How about the Variable Intermittent wiper switch from the Euro NX's that MOJO sells? NX is a B13 too. Just a thought...
    1993 NX2000: The Baby.
    1993 SE-R: Race car. :)
    2001 G20t: Daily Driver.

  15. #15
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    Quote Originally Posted by hawaiiaNX View Post
    How about the Variable Intermittent wiper switch from the Euro NX's that MOJO sells? NX is a B13 too. Just a thought...
    It should work, but has a rear wiper control on it. No big deal except for aesthetics.

  16. #16
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    Reminds me that I need to get back on this and find a OEM variable stalk that'll integrate into the B13 wiper switch....

  17. #17
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    I believe I figured out why the Maxima stalk didn't work. I checked it with a meter and it has a variable range of 10-1000 ohms. The 10,000 ohm resistor I installed in the board is well out of the stalk's range. The variable resistor value having to be higher than the fixed resistor in order for it to work. Whoops, should have checked that.

    The 10,000 ohm resistor works fine with the 1-100,000 ohm volume control I'm using, letting the variable function kick in at about 1/10th of the volume control's range.

    I believe if I install a 10 ohm resistor in the board it'll let the 10-1000 ohm stalk do it's thing, or more accurately "swing".

    Back to the laboratory....

  18. #18
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    Well piss! I solder in a 10 ohm resistor, mounted the Maxima adjustable stalk in the B13 wiper switch, wire it up and... nothing. I tried two different boards although I used them before for testing and they may be shot.

    I need a known working board and I'm going to wire in jumpers where the resistor goes, plug the switch into the car and play with different value resistors via the jumper wires. Much easier than pulling it out of the car, soldering in another resistor and hoping it'll work over and over again.

    I will get this, OEM style. :smile:

  19. #19
    Exhaustipation!
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    Figure this out yet slacker?
    Likes Chriscar Liked this post
     
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  20. #20
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    Quote Originally Posted by 1fastser View Post
    Figure this out yet slacker?
    Nope, never could get it to work with an adjustable stalk and believe me, I tried. So either use this mod as-is with the external potentiometer, source a eruo NX stalk w/rear wiper control, OR the best solution would be to source a PHDM B13 intermittent stalk, it's a direct replacement...




  21. #21
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    Seems like all the hard work is done, and you just need to get the proper resistor/pot values sorted. What are the ohm ranges on the factory stalks you've tried, and what's worked for you using an external pot?

    C
    cogito ergo zoom................
    1994 SE-R / DE+GT2560R / S4 / Nismo LSD / Calum Realtime/ 15x7 RPF1 / Hyperco - AGX. Just about stock.
    1995 Turbo Miata R Package / GT2560R NA is best, Bro / VVT engine /Megasquirt / Flyin Miata suspension / 15x8 949 6UL

  22. #22
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    Quote Originally Posted by Chriscar View Post
    Seems like all the hard work is done, and you just need to get the proper resistor/pot values sorted. What are the ohm ranges on the factory stalks you've tried, and what's worked for you using an external pot?

    C
    It's been a while, but most everything is in the thread. If I remember correctly the '91 Maxima stalk fit into the B13 switch assembly the best, but there was still an issue with it making contact with the washer fluid switch. This was a whole other issue I didn't even get to the point of addressing and I lost interest suddenly after my daughter went through some fairly serious health issues, everything is good now though .

    At this point I don't even have a B13 to continue testing on, but based solely on the fact that none of the non-B13 stalks fit well or were completely functional within the B13 switch assembly it is of my opinion that this is not worth pursuing as an "all in one" mod with OEM parts, especially considering the availability of the Euro and PHDM switches. But if one doesn't mind the separate potentiometer as I did, then it's a fairly easy mod.

    Another thought that I had was cutting a rectangular slot into the USDM B13 stalk, just to the left of the "Off/speed" lettering, and mounting a small volume "wheel" like you might find on a small radio, onto the back but protruding through the hole. The wires could then run down the back of the stalk and into the switch. This would be a much cleaner, more contained approach.

    Anyway, it was nice to read back through this thread, I'm glad you guys reminded me. I'm pretty proud with what I accomplished.

    More good info on this... B13 variable intermittent wiper mod? YES!
    Last edited by SE-RMonkey; 10-26-15 at 09:46 PM.

 

 

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