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Hvac blower motor resistor help!!

Discussion in '2nd Gen. Tacomas (2005-2015)' started by JennJenn, May 4, 2020.

Page 16 of 16
  1. Mar 27, 2022 at 3:43 PM
    #301
    08TRDOFFROAD

    #301
    08TRDOFFROAD Well-Known Member

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    21' Tundra Platinum & 08' TRD Offroad DCSB 4x4
    Bilstein 5100's w/front's set at 1.75", TRD exhaust, Colormatched grill, Illuminated 4wd selector switch, BAMF Bolt on Sliders w/kickout.
    Sorry to bump an old thread.

    Jimmy, what if I am only getting 9.75 volts on the black/yellow?

    My blower is dead at all speeds. I have swapped the heater relay and put 12v to the motor and it works fine. Also can hear the engine load up when I turn the switch when it engages the ac compressor. Checked for continuity on the white/blue and got a reading of 2.3 ohms. When I run the switch through the speeds, the ohms on the blue/white are lo-2.5. 2-10.8, 3-12.5, hi-16.8 ohm.

    I'm stumped.

    Don't know where to go from here to figure it out.
     
    08TRDOFFROAD, Mar 27, 2022
    #301
  2. Mar 27, 2022 at 5:22 PM
    #302
    Jimmyh

    #302
    Jimmyh Well-Known Member

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    Where exactly are you reading this 9.75 Volts on the circuit?

    If you are only getting 9.75 volts at the Black/Yellow wire at the motor there is a high resistance connection somewhere up stream towards the 50 amp heater fuse. You need to check for high resistance on the red wire from the heater fuse to the relay and then the yellow and black wire between the relay and the blower motor connection.
    [​IMG]
     
    Jimmyh, Mar 27, 2022
    #302
  3. Mar 27, 2022 at 8:51 PM
    #303
    08TRDOFFROAD

    #303
    08TRDOFFROAD Well-Known Member

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    21' Tundra Platinum & 08' TRD Offroad DCSB 4x4
    Bilstein 5100's w/front's set at 1.75", TRD exhaust, Colormatched grill, Illuminated 4wd selector switch, BAMF Bolt on Sliders w/kickout.
    Yeah. The 9.75 volts was at the blower plug under the dash.
    Thanks, I will pull the relay/fuse and check that in the am and report back.
     
    08TRDOFFROAD, Mar 27, 2022
    #303
    Jimmyh[QUOTED] likes this.
  4. Apr 5, 2022 at 9:30 PM
    #304
    08TRDOFFROAD

    #304
    08TRDOFFROAD Well-Known Member

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    21' Tundra Platinum & 08' TRD Offroad DCSB 4x4
    Bilstein 5100's w/front's set at 1.75", TRD exhaust, Colormatched grill, Illuminated 4wd selector switch, BAMF Bolt on Sliders w/kickout.
    Jimmy, is 1A4 on the blower b/y line just a junction?
     
    08TRDOFFROAD, Apr 5, 2022
    #304
  5. Apr 6, 2022 at 12:16 AM
    #305
    Jimmyh

    #305
    Jimmyh Well-Known Member

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    Junction between two sections of wiring harness. That would be IA4 not 1A4 as it is behind the instrument panel.

    Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows (>>). Outside numerals are pin numbers.

    The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component’s location, e.g,
    ”E” for the Engine Compartment,
    ”I” for the Instrument Panel and Surrounding area, and
    ”B” for the Body and Surrounding area.
    When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiring harness and wiring harness connector.
     
    Last edited: Apr 6, 2022
    Jimmyh, Apr 6, 2022
    #305
    TnShooter and 08TRDOFFROAD[QUOTED] like this.
  6. May 3, 2022 at 8:25 PM
    #306
    08TRDOFFROAD

    #306
    08TRDOFFROAD Well-Known Member

    Joined:
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    Messages:
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    Gender:
    Male
    First Name:
    Dan
    Vehicle:
    21' Tundra Platinum & 08' TRD Offroad DCSB 4x4
    Bilstein 5100's w/front's set at 1.75", TRD exhaust, Colormatched grill, Illuminated 4wd selector switch, BAMF Bolt on Sliders w/kickout.
    Any idea where the B/Y goes after it splits after the heater relay? Or where I might find IA4 in the instrument panel as I am pretty sure that is where my issue is at. Want to inspect the connection and possible pull a new wire to the blower motor.
     
    08TRDOFFROAD, May 3, 2022
    #306
  7. May 3, 2022 at 8:45 PM
    #307
    Dm93

    #307
    Dm93 Test Don't Guess

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    Is this what your looking for?
    08 Interior Wire Harness Locations.jpg
     
    Dm93, May 3, 2022
    #307
    Jimmyh likes this.
  8. May 4, 2022 at 4:55 AM
    #308
    08TRDOFFROAD

    #308
    08TRDOFFROAD Well-Known Member

    Joined:
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    Messages:
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    Gender:
    Male
    First Name:
    Dan
    Vehicle:
    21' Tundra Platinum & 08' TRD Offroad DCSB 4x4
    Bilstein 5100's w/front's set at 1.75", TRD exhaust, Colormatched grill, Illuminated 4wd selector switch, BAMF Bolt on Sliders w/kickout.
    Yes, that is exactly what I am looking for! Thank you!
     
    08TRDOFFROAD, May 4, 2022
    #308
    Jimmyh likes this.
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