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Discussion in 'Technical Chat' started by buckbiter, Mar 11, 2011.

  1. Mar 11, 2011 at 9:46 PM
    #1
    buckbiter

    buckbiter [OP] New Member

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    I have a 1999 tacoma, 4x4 with a manual transmission. When i turn the key on it dosnt even light up the lights on the dash. I have replaced the battery, checked all the fuses and pulled out the ignition controler behind the key switch. I am wondering if there is something in the wiring that signals the key switch to work. something that it sends power to and has to have a return voltage to engage the other terminals on the ignition switch. Any ideas? Where might i get a wiring diagram?

    Thanks,
    NoGoJoe
     
  2. Mar 11, 2011 at 9:52 PM
    #2
    TmecTaco79

    TmecTaco79 Well-Known Member

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    Did you check for voltage to the key switch itself?
     
  3. Mar 11, 2011 at 9:55 PM
    #3
    S.B.

    S.B. Well-Known Member

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    Or check the voltage on the battery? It could be the battery is deab, because the alternator could be bad and not charging the battery (since you said the battery was new).
     
  4. Mar 11, 2011 at 10:04 PM
    #4
    TmecTaco79

    TmecTaco79 Well-Known Member

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    If he swapped out the battery and the alternator was bad the truck would still start but wouldnt run for very long since all the juice would be coming from the battery. I don't think he's getting power either to the key switch or maybe through it.
     
  5. Mar 11, 2011 at 10:10 PM
    #5
    S.B.

    S.B. Well-Known Member

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    Correct, but the alternator may have recently died or could of barely been working last and the battery could of had just enough voltage and over night (or sine the last time it was driven) could of died. Either way I would check battery voltage first.
     
  6. Mar 11, 2011 at 10:16 PM
    #6
    TmecTaco79

    TmecTaco79 Well-Known Member

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    If he replaced the battery with a new one and he still doesn't have any juice I don't know how he could have run it.
     
  7. Mar 11, 2011 at 10:19 PM
    #7
    S.B.

    S.B. Well-Known Member

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    idk if its was run or not after the new battery.
     
  8. Mar 11, 2011 at 10:25 PM
    #8
    TmecTaco79

    TmecTaco79 Well-Known Member

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    I don't think he has. But then again he hasn't thrown in anymore input so.... Who knows:notsure:
     
  9. Mar 11, 2011 at 10:42 PM
    #9
    DCtaco05

    DCtaco05 Well-Known Member

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    make sure there is good connection to your battery terminals. there should be since u just replaced it

    and its gonna be the alternator. my buddies 2000 tacoma just had the same symptoms. i didnt think that even if the alternator was bad that it wouldn't start, i just thought it wouldn't stay running

    but we replaced the alternator and it started right up.
     
  10. Mar 11, 2011 at 10:46 PM
    #10
    TmecTaco79

    TmecTaco79 Well-Known Member

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    Weird. My friends car had a bad alternator but we were still able to start and drive it for 15 miles till we got it home. But then again that wasn't a toyota so it might have been wired differently.
     
  11. Mar 11, 2011 at 10:49 PM
    #11
    S.B.

    S.B. Well-Known Member

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    This is my understanding also. I could be a Toyota thing. I know that the 4-runners with the hard top wouldn't run with out the bolts in (for the top) with the top on.
     
  12. Mar 11, 2011 at 11:00 PM
    #12
    TmecTaco79

    TmecTaco79 Well-Known Member

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    WTF?? Really? I guess that's toyota being safe:D But those things look sick without the top on and made into a trail rig.
     
  13. Mar 11, 2011 at 11:01 PM
    #13
    DCtaco05

    DCtaco05 Well-Known Member

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    yea we had to move his truck to my house so i used jumper cables and started his truck with mine. it ran but when we parked at my house, he turned it off and then it wouldn't start. so it did run though. then like i said new alternator and what do you it know ? it starts
     
  14. Mar 11, 2011 at 11:01 PM
    #14
    TmecTaco79

    TmecTaco79 Well-Known Member

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    So is the op m.i.a. or what:confused:
     
  15. Mar 11, 2011 at 11:01 PM
    #15
    S.B.

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    Hells ya, I wish I could afford a trail rig.
     
  16. Mar 11, 2011 at 11:04 PM
    #16
    TmecTaco79

    TmecTaco79 Well-Known Member

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    Me too:( so much money tho. Especially if it's a dedicated trail rig.
     
  17. Mar 13, 2011 at 2:21 PM
    #17
    buckbiter

    buckbiter [OP] New Member

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    Thanks for the responses. Saddly I still have the problem.

    I have 12.4 volts on the battery and the same at the key switch. I have replaced the electrical portion of the key switch and still have no power to turn the engine over nor to the lights on the dash or any beepers. I am wondering if the key switch sends a voltage to something else and in return receives a voltage to operate the remaining contacts at the switch. I guess it could be a computer problem or something but i do have full voltage at the ignition switch. Thanks for your time.

    Still,
    NoGoJoe
     
  18. Mar 13, 2011 at 3:08 PM
    #18
    TmecTaco79

    TmecTaco79 Well-Known Member

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    I would say check the starter relay. Make sure you have power going to it and switch the key switch on and make sure you have power coming out.
     
  19. Mar 13, 2011 at 3:44 PM
    #19
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    It doesn't work that way. It's just a set of dry contacts. By your earlier description, it sounds more like a bad connection somewhere or bad terminals. Both the gauge and starter relay get their power via the switch.
     
  20. Mar 13, 2011 at 3:50 PM
    #20
    jjew18

    jjew18 the Nightman cometh!

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    Like he said ^, check your connections.
     
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