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UPDATE FIXED: Wiper/Washer system not working

Discussion in '1st Gen. Tacomas (1995-2004)' started by thebigmugamba, Dec 7, 2019.

  1. Dec 7, 2019 at 10:10 AM
    #1
    thebigmugamba

    thebigmugamba [OP] Member

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    I'm a little stumped. I brushed some snow off my truck and turned on the wipers. The wipers jolted and then stopped working. Never had a problem before. I checked the motor with a friends truck, it works. I swapped the fuse, no change. I checked the wiper transmission, it works. I put in a new combo switch, still doesn't work. I checked the wires for continuity, they all have it.

    I also noticed they put 16 gauge wire on a 20A circuit. Seems odd.

    Anyone else have similar problems and/or found a solution? I'm currently at a loss.

    '01 3.4 xtra cab.
     
  2. Dec 7, 2019 at 10:12 AM
    #2
    BartMaster1234

    BartMaster1234 American Auto Horns

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    Could be the integration module/dash fuse box at fault. There’s some internal logic to it that perhaps is responsible for the washer circuit.
     
  3. Dec 7, 2019 at 12:02 PM
    #3
    Wyoming09

    Wyoming09 Well-Known Member

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    Sounds dumb but are the wiper blades frozen to the windshield ??

    Snow and Ice leaves other frozen junk in the transmission tunnel keeping things from moving

    If your getting voltage to the motor they should move.
     
  4. Dec 7, 2019 at 1:05 PM
    #4
    thebigmugamba

    thebigmugamba [OP] Member

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    I'm not getting voltage to the motor, but the wires all have continuity. They could have been frozen at the time, but I'm far away from the snow now. Was just up there for thanksgiving.
     
  5. Dec 7, 2019 at 1:47 PM
    #5
    thebigmugamba

    thebigmugamba [OP] Member

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    Is there a way to check this without buying a replacement?
     
  6. Dec 7, 2019 at 1:48 PM
    #6
    BartMaster1234

    BartMaster1234 American Auto Horns

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    There should be instructions in the Factory Service Manual. I don’t have it handy.
     
  7. Dec 8, 2019 at 2:39 AM
    #7
    Wyoming09

    Wyoming09 Well-Known Member

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    Unless things changed looking at my 2000 EWD

    You have voltage at the wiper fuse with the ignition switch on ?? Voltage comes via the ignition switch.

    Every thing else is in the wiper /washer switch.

    Did you check the old switch at all?? Just where did the new switch come from??

    Does the washer Motor Work ??

    Even though it plugs in the pins may very well be different .The replacement switch does not work from new ?

    In changing things did one or more of the pins get bent??
     
  8. Dec 8, 2019 at 5:57 AM
    #8
    Wsidr1

    Wsidr1 Well-Known Member

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    I had the opposite (but same?) problem with my wipers: they came on with the switch in the off position, and would not turn off. Washer function did not work. I had to pull the fuse to get them to stay off.

    Turned out to be bad wires down at the washer pump. Others on here have reported a problem in the same location. Mine was just up from the connector to the washer pump.

    I think these wires were damaged at the factory or wire harness maker. Gradually, that weak point corroded failed. They were nowhere near anything to rub or get pinched.

    upload_2019-12-8_7-52-8.jpg

    upload_2019-12-8_7-52-36.jpg
     
    cruiserguy likes this.
  9. Dec 8, 2019 at 6:38 AM
    #9
    Glamisman

    Glamisman Well-Known Member

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    hope this helps
     

    Attached Files:

  10. Jun 16, 2020 at 6:43 PM
    #10
    thebigmugamba

    thebigmugamba [OP] Member

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    Wanted to update in case someone has the same problem.... also thank you to everyone for your input

    I traced the problem to the J/B no. 1 under the dash. I literally had to take it out and test the continuity of all the relevant lines. There was a break between 2 (1I) and 13 (1G)... but the break was only somewhere along the line of the actual 20A Wiper fuse or possibility with the fuse holder itself. All other lines that used the 2(1I) power input were OK. (And if you were wondering, yes the fuse was good... I was way past that point)

    To fix the problem I ordered an inline fuse holder off of Amazon and t-tap spliced one side to the B - Y 2(1I) wire and the other to the L (blue) 13(1G) wire. The fuse in the junction box still needed to be inserted to start the car though, which was odd to me considering the schematic below... but it worked!!

    I couldn't find the short originally because I had only traced the circuit back to J/B no. 3, instead of continuing all the way back to J/B no. 1.

    upload_2020-6-16_18-34-54.jpg

    I now have functioning wipers again. Just in time for.... a dry las vegas summer.


    inline fuse holder link: https://www.amazon.com/gp/product/B07Q9PL4R6/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
     
    Last edited: Jun 17, 2020
    Kevins60 and cruiserguy like this.
  11. Jun 17, 2020 at 2:31 AM
    #11
    Wyoming09

    Wyoming09 Well-Known Member

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    Glad you figured it out.

    I do think you mean open rather then shorted .

    A short means open fuses or burnt and melted wires at worst a visit from the Fire Department.

    Open is just that a open in the circuit not allowing the circuit to be complete.
     
    cruiserguy likes this.

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