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Need help diagnosing electrical issue

Discussion in '5th Gen 4Runners (2010-2024)' started by ddenslow, May 29, 2024.

  1. May 29, 2024 at 5:32 AM
    #1
    ddenslow

    ddenslow [OP] New Member

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    I replaced the stock head unit with an aftermarket unit on Sunday. While the head unit works fine, I now have a bunch of electrical issues and need help diagnosing the problem. Here are the problems I've noticed:

    - climate control panel doesn't have power / ac / heat doesn't work
    - no windows will roll down other than back windshield
    - sunroof won't open
    - heat warmers don't work
    - back windshield wiper/washer won't work
    - usb charging port on console won't work
    - reverse camera won't work
    - exterior temperature gauge and compass won't work

    Any ideas? Thank you!!
     
  2. May 29, 2024 at 5:49 AM
    #2
    Borracho Loco

    Borracho Loco My 4Runner identifies as a Prius!

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    Oooh look, another mod.....
    You didn't read the answers we posted in your other thread about this same issue?

    https://www.4runners.com/threads/aftermarket-head-unit-gone-wrong-help-please.38849/
     
  3. May 29, 2024 at 5:53 AM
    #3
    ddenslow

    ddenslow [OP] New Member

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    I did, however the error lights are no longer on. I checked the locations of all fuses and they are correct.
     
  4. May 29, 2024 at 7:11 AM
    #4
    catbrown357

    catbrown357 New Member

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    I assume you cut into the wiring harness?
     
  5. May 29, 2024 at 7:11 AM
    #5
    ddenslow

    ddenslow [OP] New Member

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    I don't believe so? No cuts that are visible. Could it be the alternator fuse?
     
  6. May 29, 2024 at 7:13 AM
    #6
    catbrown357

    catbrown357 New Member

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    What I mean is, did you cut and splice the wires when you replaced the head unit? Or, did you do the correct thing and order all of the adapters and plugs from somewhere like Crutchfield?
     
  7. May 29, 2024 at 7:14 AM
    #7
    ddenslow

    ddenslow [OP] New Member

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    Ah gotcha. No, the new head unit came with a new wiring harness and all the adapters/plugs
     
  8. May 29, 2024 at 7:16 AM
    #8
    Slopemaster

    Slopemaster Slope Survivalist

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    265-70-17 Ridge Grapplers, TRD Pro rims, 3M precut bra, N-Fab nerf/steps
    Unplug your new head unit and see if some of your issues go away.
     

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