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Check engine light

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fr8train, Jan 19, 2002.

  1. fr8train

    fr8train 1/2 ton status

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    When I switch my 208 into any 4whl setting the check enine light comes on. Any ideas? There is no problem driving it YET. Kinda creepy feeling though.

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  2. Thunder

    Thunder 3/4 ton status

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    Maby the lights or lettering got swapped around somehow.
    Does the check engine light come on when you turn the ignition switch to on? It should. Then it should go out after the engine starts.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

    <font color=blue>Nevada... Where the pavement ends and the west begins
     
  3. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Hmmmmmmm.........That's wierd! ***Generally***, the check engine light indicates a fuel-related or vacuum-related problem. Is the 4x4 on an 88 activated or controlled by vacuum at all?



    <font color=red>DIGGING AND DIGGING AND DIGGING</font color=red>
     
  4. fr8train

    fr8train 1/2 ton status

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    The light is actually coming on when I get her into any setting in 4whl drive......In 2whl. the light will go off as soon as it starts to crank and stays off after firing up...

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    "JEEP....SO GIRLY, BARBIE HAD TO HAVE IT"
     
  5. fr8train

    fr8train 1/2 ton status

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    Thats what I am saying theres only a 2 wire plug thing and that speedo cable.......

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  6. Greenblazer-AZ

    Greenblazer-AZ 1/2 ton status

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    When I read something like this it makes me really appreciate my '74. What good are those lights to the general public anyway? I can see someone wondering why the light is still on after they've opened the hood to make sure the engine was still there. It may as well say "Broken Engine" or "Take me to a mechanic" or what the manufacturer really wants is to convince you to do is"Take vehicle to your dealership". Otherwise it might actually tell you what the light means. Like "Vacuume Leak", or "Low Vacuume". I know what the Oil pressure guage means and the temp guage means but what the hell is "Check Engine" supposed to mean? I feel your pain...Good luck!

    If you knew the truth, you too would be against marijuana prohibition!
    Blue '74 K5 Blazer Topless W/ 35 BFG Muds (See profile for pics)
     
  7. riz

    riz 3/4 ton status

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    <font color=purple> Dummy lights !

    L8r,
    . Riz . <a target="_blank" href=http://www.geocities.com/rizmonkey>www.geocities.com/rizmonkey</a>

    <font color=purple> monkeys steal my underwear at night
     
  8. Thunder

    Thunder 3/4 ton status

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    Ok. Beings the check engine light and the light telling you the 4X4 is engaged are right next to each other. I would suspect some kind of a short between the two. You might want to pull the dash and check it out.
    That is the only thing I can think of that would cause that to happen.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

    <font color=blue>Nevada... Where the pavement ends and the west begins
     
  9. fr8train

    fr8train 1/2 ton status

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    Ya know that mysterious light that you guys are taking aboot "4x4".....it has never come on during my whole ownership of the vehicle.... I will check out that theory....anyone think I can just hook in that "key" to pull a code? Again thanks guys for the help and suggestions.

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  10. Burbinator

    Burbinator 1/2 ton status

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    Someone had the dash apart and put the bulbs in the wrong sockets...?

    Haze gray and underway...<font color=blue>or blue, in my case.</font color=blue>
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  11. fr8train

    fr8train 1/2 ton status

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    Hmmmmm....will check that out too.

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    "JEEP....SO GIRLY, BARBIE HAD TO HAVE IT"
     
  12. Boss

    Boss 1/2 ton status Author

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    The 2 wire plug thing you mentioned on your Tcase is the 4WD sensor indicator. It just let's you know when you shift into 4hi or lo. I would think the bulbs got switched in the check engine place or something since it's coming on everytime you put it in 4wd.
    Boss

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  13. What year is your blazer? My 89 blazer has the SES (service engine soon) light on the right side of the 4x4 light in the speedo head. Yours should be the same? If you didn't buy the rig new, it's possible someone else had the dash apart at some point in time and put the SES light cover on the wrong side? Just thought it might be something simple like that. You might check that.

    Later,
    Doug

    4 wheelin's not a job, it's an adventure!
     
  14. Innerpiece

    Innerpiece 1/2 ton status

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    here's an easy test -- pull the wire from the Tcase and jump the two pins together with the ignition on -- see what light come's on ... then ground the diagnostic pin on the ALDC and see which light blinks ... easy test to see if they are wired up wrong without pulling the dash
     

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