Question about 1994 GMC Jimmy

6 Answers

Digital instrament cluster

Removed cluster now gauges will not display.speedo works

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  • ally490 Jun 13, 2008

    yes all of them

  • ally490 Jun 13, 2008

    speedo flashed on &off. took cluster out reinstalled,now gauges will not work.94 gmc jimmy digital instrument cluster

  • ally490 Jun 13, 2008

    have ignition supply.fuses are fine. where is ecu located.

  • ally490 Jun 14, 2008

    reinstalled new cluster. speedo works but gauges do not work.speedo was my original problem.

  • ally490 Jun 18, 2008

    just for the hell of it pluged asunpro code scanner in.i got code 67-81-82

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6 Answers

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Hello,

The best way to resolve the speedo is to consult the service center of the unit. some problem can be resolve by personally diagnosing it, and this require you speedo. maybe electrical wirng faulty on it.

melnavz

Posted on Jun 18, 2008

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Are you sure reinstalled new cluster is ok?
http://www.mrwhizard.com/
1989-94 Blazer/Jimmy/S-10/Bravada Digital Unit - Repair Cost only $149 USD includes all shipping!!

Posted on Jun 18, 2008

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Disassemble all the parts which you have fitted ,slowly and carefully assemble it again fit it properly and then see.the problem is just the improper fitting or connections.be brave do it one more time.wish u success.

Posted on Jun 18, 2008

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Either the harness is loose or the connectors are loose. You need to firmly seat the cluster and recheck the connections.

Posted on Jun 13, 2008

  • Benjamin Patri
    Benjamin Patri Jun 13, 2008

    the ecu is located under the dash

  • Benjamin Patri
    Benjamin Patri Jun 28, 2008

    If you are satisfied with your experience here, then feel
    free to provide me with some feedback by rating my solution. If you need any
    more help, I would be glad to assist you, just ask.



    Thanks for your time and service and I hope you have a Great Day!




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Have you checked the fuses?

Posted on Jun 13, 2008

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One moment - just checking....

Posted on Jun 13, 2008

  • 2 more comments 
  • Richard Perkins
    Richard Perkins Jun 13, 2008



    Check ignition supply is reaching the unit - Turn headlights on andignition to on position. This will provide backlighting if supply is reaching them



    If you are getting a supply, check all fuses for any damage.



    Then check plugs particularly to ECU. Make sure they are seated fully.



    Hope this helps.

  • Richard Perkins
    Richard Perkins Jun 13, 2008

    I would try and obtain a second hand unit to at least try.



    This would be less expensive than an ECU, be easier to install, and still retain value if it is not the cluster that is defective.



    There are companies that specialise in the testing and repair of clusters - here is a link to one, but would be best to shop around - or look locally.



    http://www.mrwhizard.com/index.cfm



    Try to treat them as static sensitive devices in future.



    Hope this helps you.


  • Richard Perkins
    Richard Perkins Jun 13, 2008

    ECU should be located in the engine bay at the end of the biggest area of loom. Usually fixed high up on steelwork.



    Check loom cabling in the area where it passes through bulkhead & look for chafing.

  • Richard Perkins
    Richard Perkins Jun 14, 2008

    Apart from the removing the cluster, has anything else been moved recently?



    There are a number of users who complain that these clusters overheat, blow chips or produce false readings. There seems to be a design fault of poor cooling; And working replacements are much in demand.



    I would contact the specialist listed above for further advice as they see a lot of these problems and could probably advise further to pinpoint the problem. If nothing else has been moved, I cannot see a fault appearing anywhere other than the instrument cluster you are working on.

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