Question about 2003 Chevrolet TrailBlazer

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Complete interior electrical failure 2003 Trailblazer

I had my oil changed on my 2003 Trailblazer and now the lighting, door locks, AC, dash lights and radio will not turn on/work. All the fuses and relays are good.

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  • 6 more comments 
  • michaelshaff Sep 11, 2009

    I have taken it back twice and they only shrug their shoulders and say "all we did was change the oil". I've looked under and around where they worked and I don't see any obvious signs of damage or loose connectors. I live in Germany so taking it right down the street to the Chevy dealer is far fetched. Is there one box or plug that runs the entire interior electrical system?

  • michaelshaff Sep 11, 2009

    I pulled the battery cables off and they're not corroded. They're very clean. The battery gauge suggests that the battery is at a good capacity. All exterior lights and such work fine. It's only the interior that I have a problem with.

  • michaelshaff Sep 11, 2009

    I've checked:
    fuses
    relays
    battery
    battery cables
    loose plugs/damaged wires

  • michaelshaff Sep 11, 2009

    Everything worked as advertised right before I dropped it off. I even remember turning the radio off as I was pulling up to the service entrance. As soon as I got it back I noticed that the radio would not come on and no longer displayed the clock. Also, the window would not roll down. Then I noticed that the interior lights did not work and AC did not work. I took it back and they said "we don't do electrical work here". I told them what had happened in more detail and they only said "all we did was change the oil". Now, the vents blow hot air non-stop, I have no dash lights (gauges work fine though) and the nothing seems to fix it. I leave for Iraq on Monday and I don't want my wife to have to deal with this problem.

  • michaelshaff Sep 11, 2009

    I checked those as well. I've looked at the main fuses under the hood, accessory fuses under the back seat and checked all relays.

  • michaelshaff Sep 11, 2009

    I haven't checked that yet but it seems like a likely culprit. Thanks for the input!

  • michaelshaff Sep 11, 2009

    Also, where is that located? I might need to know that!

  • michaelshaff Sep 11, 2009

    Also, where IS the grounding bond located? Any ideas?

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5 Answers

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  • Master
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Check on the 'fire wall'. Maybe when they changed the oil, they pulled the 'grounding bond' from the fire wall that references all the 12 volt instrument panel to the 12 volt system.

Posted on Sep 11, 2009

  • Craig Butler
    Craig Butler Sep 11, 2009

    Look along the fire wall the back of the engine compartment. There is a strap or wire (sometimes it's braided wire) that bonds the whole dash assembly to the engine for grounding.

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  • Master
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Do you have 12 volts to the breaker/fuse panel??? if not check under the hood for a main power breaker/fuse directly off of the positive battery lead somewhere between the battery and the back of the breaker/fuse panel on the firewall side in engine compartment

Posted on Sep 11, 2009

  • daniel  hendrickson
    daniel hendrickson Sep 11, 2009

    Your Ground Bond is usually the frame and they pick it up again(Ground-Bond) closer to the breaker/fuse bank on that particular vehicle, its to save money on wiring in manufacture,going back thinking on this.....make SURE that ALL breakers/fuses are in there appropriate holders,this sounds "far-fetched" but I have seen back feeds that will let current flow w/breakers in the wrong location even with all other circuits OFF i.e. keys out of ignition,don't get me wrong as I'm not pointing a finger at ANYONE,,but were there any electrical issues before this and did someone possibly move breakers/fuses in the panel to rectify an earlier issue. thank you: Daniel

  • daniel  hendrickson
    daniel hendrickson Sep 11, 2009

    Just Me Again:another idea...
    Make sure battery is fully charged,then remove neg battery cable for the night,in morn,see if you have full chg left in battery, then, get in a darkened area if possible and remove each fuse ONLY one at a time and see if they spark i.e. current draw on that circuit,some like the (ECM) fuse will spark cause their always live to keep memory alive for engine parameters,another thing.....I have seen (ECM) not go into what they call a "DEEP-SLEEP" mode when vehicle shut off and they can drain a battery.....Also MY HATS OFF TO YOU....TAKE CARE in IRAQ...wish that was over!!!


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  • Master
  • 2,777 Answers

Did you change the oil yourself or have a company do it? If you had a company do it did the lights not work as soon as you picked it up? If you did it yourself did they not work as soon as you tried to start it for the first time?

Thanks, please let me know
Tim

Posted on Sep 11, 2009

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  • Chevrolet Master
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The very 1st thing to do is check the battery and battery cables, the new sealed batteries fail all of a sudden with no warning, a typical complaint is I went in the store and came out and nothing worked and car would not start, have done 100's for this type of battery problem, also make sure the batteery cables are not corroded or loose.

Posted on Sep 11, 2009

  • 1 more comment 
  • yadayada
    yadayada Sep 11, 2009

    The age of the battery seems to make little difference with this type of failure.

  • yadayada
    yadayada Sep 11, 2009

    Has the battery been tested, u don't say.

  • yadayada
    yadayada Sep 11, 2009

    u battery say battery has been checked but has it been load tested?? kragen and other stores like kragen do this for free. don't guess on this, don't just check voltage, trust me you can be chasing your tail if u do.

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  • Master
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If you had this done by a quick lube place, they could have possibly disconnected some wiring harness. Take it back to the place and make them fix it. They are liable.

Posted on Sep 11, 2009

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