Question about 1991 Cadillac DeVille

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91 cadillac starting problems. turn the key to start but only all the power comes on but doesn't spin starter. took to a shop and thought they had it fixed but it only lasted bout 2 days now its back to not startin. they wont tell what they did ncan you please help me outg

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  • elvis78usa Nov 18, 2009

    its nothing with the charging system thats the 1st thing u check it has all the power but turn key to start poswition nothin happens

  • elvis78usa Nov 20, 2009

    i was jusy bout to check that but know the security light is on

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  • Cadillac Master
  • 6,982 Answers

Time to find another shop. No reputable shop will repair your vehicle and NOT tell you what work was done!!
As for your problem, I can give you maybes: Could be that the battery is going bad or that the charging system is failing or has partially failed. (quick test is with the engine running place a volt meter across the battery..With all accessories on you should show at least 12,9 volts.(with time, volts should not continue to drop) Since you cannot get it to start, you need to make sure there is at least 12v in the battery, and that with the key turned to the start position voltage does not drop below 9,5 volts and returns quickly to 12v when key is off. Check all battery and cable connections to make sure they are clean and secure. Problem may also be with the starter or security system but at this point, I don't think it is.

Posted on Nov 18, 2009

  • Richard Scordino Nov 18, 2009

    If the battery is fully charged, and has been load tested to make sure it's good, make sure you are getting 12v to the small trigger wire on the starter. If you get 12v there with the key turned to "start", then the starter has failed. Make sure of battery condition and that all connections are really good first though (Always test with a meter...can't tell you how many times I've had a tech tell me something was good, then, when I'd re-check it with a meter it wasn't!)
    Only other item is security system but generally it will turn the engine but won't start if that happens.


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  • Contributor
  • 10 Answers

CHECK TO SEE IF SECURITY LIGHT IS BLINKING IF SO ITS THE VATS VEHICLE ANTI THEFT SYSTEM IT WILL SHUT DOWN CAR GOOGLE IT AND YOU WILL SEE ALONG LIST OF CADI AND GM CARS WITH SAME PROBLEM LET ME KNOW I CAN HELP I HAVE A 96 STS HAVE HAD SAME PROBLEMS GOOD LUCK

Posted on Apr 13, 2010

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