Wiring diagrams

Discussion in 'Domestics' started by Chuck, Aug 11, 2017.

  1. Chuck

    Chuck Full Member

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    Please fill out the following to ask a question.

    MAKE: GMC
    MODEL: Suburban
    YEAR: 1990
    MILES: 236653
    ENGINE: 5.7L
    DESCRIBE ISSUE....I need the wiring diagrams so I can find out why it has no dome lights or horn and the horn fuse blows out instantly.
     
  2. kev2

    kev2 wrench

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    no time to explain right now-
    I think dome and horn same fuse SO
    remove horn relay - does the fuse still blow?
    yes - ck cig lighter
    no - then advise me as another diagram needed

    Dome lights - front and rear inop?
    Glpve box llight ?

    Sorry GTG
     
  3. nickb2

    nickb2 Wrench. I help when I can

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    Ok, me being the asshole I like to be, if that fuse is blowing instantly, short to ground, don't pass go and collect 200$

    You wanted a wiring, you may not like it. Horn is not on dome light circuit. So mostly a bad wiring job, or a fuse block problem. Cig lighter is on horn circuit, start there, dome light is another issue.

    See ace 0 pdf.
     

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  4. kev2

    kev2 wrench

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    was busy this morning and had to run -
    I saw this for fuse box and posted about possible same fuse let us know, these older models are a PIA for getting good diagrams.

    Also do the underdash entry lamps come on when door opened OR headlight switch turned full bright ?

    double check that lighter - anything plugged into that or ALDL ?
     

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    Last edited: Aug 12, 2017

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