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HELP -- Flashing 4hi-4lo lights with other lights on??

Discussion in '2nd Gen Tundras (2007-2013)' started by ZenkiS14, Jun 23, 2021.

  1. Jun 23, 2021 at 3:55 PM
    #1
    ZenkiS14

    ZenkiS14 [OP] New Member

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    Hey guys, hoping someone can offer me some insight, 2012 Tundra RW 5.7 4WD, 150k miles, great condition, well maintained and serviced by dealer...

    Had the truck at the dealer on Friday, they did an oil change and tire rotation, drove it a few times over the weekend, roughly 100 miles. Delivered some small furniture to a buddy Monday at 10pm and parked it after. Started it today, and I got my ABS, BRAKE, Traction lights on, and my 4HI-4LO flashing at me. Any ideas?

    Video: https://i.imgur.com/qLjH4fx.mp4

    [​IMG]

    [​IMG]
     
  2. Jun 23, 2021 at 4:46 PM
    #2
    blackdemon_tt

    blackdemon_tt Battery Slayer

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    Pull codes... theres a matrix somewhere if you don't have access to one.
     
    Wynnded likes this.
  3. Jun 23, 2021 at 4:52 PM
    #3
    Lifer

    Lifer New Member

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    Did the Tech possibly bump the rear wheel sensor? Look under and make sure their intact.
    When I went to check codes it did not show anything.
     
    15whtrd likes this.
  4. Jun 23, 2021 at 4:53 PM
    #4
    Trident

    Trident New Member

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    [​IMG]
     
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  5. Jun 23, 2021 at 5:42 PM
    #5
    wv00097

    wv00097 Recovering drop bracket owner.

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    Plenty of research done on this. Wheel speed sensor. Follow the wires and find where its damaged and replace.
     
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  6. Jun 23, 2021 at 6:11 PM
    #6
    ZenkiS14

    ZenkiS14 [OP] New Member

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    Everything looks in tact so far. Both sensors look secure. I wanted to pull the plug and clean the terminals inside (might have gotten wet), but the plug doesnt seem to have a simple way to disconnect to view the terminals.

    Does the whole thing have to be replaced as a unit for the rear?

    I'm gonna try to pull the codes tomorrow.
     
  7. Jun 23, 2021 at 6:14 PM
    #7
    wv00097

    wv00097 Recovering drop bracket owner.

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    Yes, the rear is sold ready with both sides/wires joined together, from the main junction above the axle out to each wheel
     
  8. Jun 23, 2021 at 6:16 PM
    #8
    ZenkiS14

    ZenkiS14 [OP] New Member

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    Ok gotcha, that's what it was looking like. Seems ridiculous that you cant just unplug and replace a sensor...

    I'll start trying to dig up a part number...

    Any aftermarket parts proven to be reliable? or is OEM the only way to go on this?
     
  9. Jun 23, 2021 at 6:24 PM
    #9
    ZenkiS14

    ZenkiS14 [OP] New Member

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    So does the 89516B come with sensors also? or is that only the sub harness?

    upload_2021-6-23_20-21-57.jpg
    upload_2021-6-23_20-22-18.jpg
     
  10. Jun 23, 2021 at 7:21 PM
    #10
    wv00097

    wv00097 Recovering drop bracket owner.

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    BDS 7 w/ Fox 2.5 OME Dakar leaf pack CB +2 shackles 18x9 Method 308 +18mm 37x12.5 Toyo AT3 TRD intake/exhaust Infinity Kappa w/ Pioneer HU
  11. Jun 23, 2021 at 7:23 PM
    #11
    wv00097

    wv00097 Recovering drop bracket owner.

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    Its the wire harness. Most likely the sensor in the hub itself isn't damaged, just the wire. If you do that's a different problem. The wire is very delicate and easy to nick, usually the culprit. Just look for some sort of wire damage first and eliminate that. Rear is easy and "cheap", front is more.
     
    Last edited: Jun 23, 2021
  12. Jun 28, 2021 at 3:51 PM
    #12
    Mrencz

    Mrencz New Member

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    Stupid simple solution to try. My truck flashes too. My switch to move to 4wd is loose.

    Sometimes I just have to turn it to 2wd more.
    It’s flipped to 2wd but flashes. If I just try and turn the knob (even though I can’t) it fixed my issue. Worth a try.
     

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