1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Blinker and ABS Speed Sensor out?

Discussion in '1st Gen. Tacomas (1995-2004)' started by loudboy, Nov 25, 2023.

  1. Nov 25, 2023 at 12:48 PM
    #1
    loudboy

    loudboy [OP] Well-Known Member

    Joined:
    Oct 17, 2008
    Member:
    #10028
    Messages:
    280
    Gender:
    Male
    Portland, OR
    Vehicle:
    '04 4x4 TRD Off-Road Limited
    All-Pro lift, Addicted tube bumper, Revenge sliders, stuff and crap
    2004 Tacoma 4x4 Limited, V6, AT

    Edit 4/4/25, resurrecting this one because I finally have time to take a real swing at it. From the top:
    -ABS Light is on, ABS does not activate when I go skid in a dirt lot or wet pavement. The blink code says the Front Right Speed Sensor is at fault.
    -The Front Right speed sensor reads at 0.95kOhm when I unplug the connection and test it right in the wheelwell; so the sensor is good.
    -There is no continuity to pins 2 or 6 of plug IF2 (behind driver's kick panel) from the wire-harness side of the Front Right speed sensor connection, which indicates these wires are broken.
    -The Front Right Blinker does not receive 12+ when the blinkers/hazards are on; all other lights work.
    -Neither of the ABS wires nor the Blinker 12+ wire have continuity to ground.
    -The Front Right Blinker has good continuity to ground.
    -The Front Right Blinker and Front Right Speed Sensor share a large run of wire harness back to the dash, but that all looks intact.

    -This truck has suffered vermin chewing wires and an engine replacement, but both of those events were well before the ABS/Blinker problems. Something could have finally chaffed through, I suppose. The wire harness wrap looks to be intact all through the engine bay.
    -I have the Factory Service Manual and am becoming more and more familiar with it.
    Any clues?

    Original:
    My ABS light recently came on and indicates that my front right ABD speed sensor is faulty. At the same time, my front right blinker went out. Neither the ABS sensor nor the blinker bulb socket is getting power. Swapping the blinker bulb doesn't fix the blinker; I have not replaced the speed sensor.
    From what I can tell in the service manual, these two items are on completely different circuits/fuses/grounds and should not be related other than proximity. I cannot see any damaged wire harness, although most of it is not visible up there in the front right grill/bumper/wheel well. Do they share a common harness plug somewhere? Any hints on where to look to sort this out would be greatly appreciated. Thanks all!
     
    Last edited: Apr 4, 2025
  2. Nov 25, 2023 at 8:48 PM
    #2
    ControlCar

    ControlCar My Moto: Help & Learn…period.

    Joined:
    Jul 22, 2023
    Member:
    #429578
    Messages:
    3,413
    Gender:
    Male
    First Name:
    Steven
    Sugar Land TX
    Vehicle:
    1996 Taco 2.4L 2wd Automatic
    Clock Volt meter/LSPV Delete/Hyundai 16’s/FP gauge/after 9months of wrenching ZERO oil leaks
    Strange
    IMO 2 issues unrelated
    Anything possible thou

    Has the taco been worked on lately?
     
  3. Nov 26, 2023 at 2:55 PM
    #3
    loudboy

    loudboy [OP] Well-Known Member

    Joined:
    Oct 17, 2008
    Member:
    #10028
    Messages:
    280
    Gender:
    Male
    Portland, OR
    Vehicle:
    '04 4x4 TRD Off-Road Limited
    All-Pro lift, Addicted tube bumper, Revenge sliders, stuff and crap
    Whole new engine two years ago, but the problem has only been in the last year (yes, I've been driving like an unsafe unsignaling a-hole for a while now).
     
  4. Nov 26, 2023 at 6:01 PM
    #4
    ControlCar

    ControlCar My Moto: Help & Learn…period.

    Joined:
    Jul 22, 2023
    Member:
    #429578
    Messages:
    3,413
    Gender:
    Male
    First Name:
    Steven
    Sugar Land TX
    Vehicle:
    1996 Taco 2.4L 2wd Automatic
    Clock Volt meter/LSPV Delete/Hyundai 16’s/FP gauge/after 9months of wrenching ZERO oil leaks
    QUOTE="ControlCar, post: 29340544, member: 429578"]
    Guessing something to do with a Ground wire………somewhere
    Too many issues/affected lighting /abs systems at once

    kinda like this:



    ^^^on this ground, 5 separate ground wires for 5 separate systems….all related to one ground bolt to frame rail
    GL
    Please let us know[/QUOTE]
     
  5. Nov 28, 2023 at 4:42 PM
    #5
    loudboy

    loudboy [OP] Well-Known Member

    Joined:
    Oct 17, 2008
    Member:
    #10028
    Messages:
    280
    Gender:
    Male
    Portland, OR
    Vehicle:
    '04 4x4 TRD Off-Road Limited
    All-Pro lift, Addicted tube bumper, Revenge sliders, stuff and crap
    Pin 30 and 31 in the ABS plug (Plug A22 in the wiring diagrams from the Factory Service Manual) at the ABS actuator down to the Front Right Speed Sensor are open circuits. The wiring harness looks intact and the plugs are clean.
    The Front Right Blinker has good ground but no voltage coming in.
    I'll try again another day.
     
    Last edited: Apr 1, 2025
    StreetTaco95 likes this.
  6. Apr 1, 2025 at 2:03 PM
    #6
    loudboy

    loudboy [OP] Well-Known Member

    Joined:
    Oct 17, 2008
    Member:
    #10028
    Messages:
    280
    Gender:
    Male
    Portland, OR
    Vehicle:
    '04 4x4 TRD Off-Road Limited
    All-Pro lift, Addicted tube bumper, Revenge sliders, stuff and crap
    Alright, resurrecting this one because I finally have time to take a real swing at it. From the top:
    -ABS Light is on, ABS does not activate when I go skid in a dirt lot or wet pavement. The blink code says the Front Right Speed Sensor is at fault.
    -The Front Right speed sensor reads at 0.95kOhm when I unplug the connection and test it right in the wheelwell; so the sensor is good.
    -There is no continuity to pins 2 or 6 of plug IF2 (behind driver's kick panel) from the wire-harness side of the Front Right speed sensor connection, which indicates these wires are broken.
    -The Front Right Blinker does not receive 12+ when the blinkers/hazards are on; all other lights work.
    -Neither of the ABS wires nor the Blinker 12+ wire have continuity to ground.
    -The Front Right Blinker has good continuity to ground.
    -The Front Right Blinker and Front Right Speed Sensor share a large run of wire harness back to the dash, but that all looks intact.

    -This truck has suffered vermin chewing wires and an engine replacement, but both of those events were well before the ABS/Blinker problems. Something could have finally chaffed through, I suppose. The wire harness wrap looks to be intact all through the engine bay.
    -I have the Factory Service Manual and am becoming more and more familiar with it.
    Any clues?
     
    Last edited: Apr 2, 2025
  7. Apr 4, 2025 at 4:09 PM
    #7
    loudboy

    loudboy [OP] Well-Known Member

    Joined:
    Oct 17, 2008
    Member:
    #10028
    Messages:
    280
    Gender:
    Male
    Portland, OR
    Vehicle:
    '04 4x4 TRD Off-Road Limited
    All-Pro lift, Addicted tube bumper, Revenge sliders, stuff and crap
    Bump for a little help here? How could three wires in a harness go bad? Other items in that wire harness still work, such as the windshield washer pump which is in the same area of the engine bay.
     
  8. Apr 4, 2025 at 4:19 PM
    #8
    TashcomerTexas

    TashcomerTexas My truck is a whiner

    Joined:
    Apr 16, 2014
    Member:
    #127853
    Messages:
    10,350
    Vehicle:
    2003 TRD DC Supracharged

Products Discussed in

To Top