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Thread: Follow up on DEAD

  1. #1
    wyosaddleman is offline Cadillac Owners Member
    Automobile(s): DTS
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    Dead

    Last week our DTS started running rough, you could feel it in the idle as well as driving, just before turning it off the check
    charging system light came on. A day later my wife went to start it, all lights came on but it wouldn't start. I wasn't able to
    look at it until today and it is completely dead. It won't even let me turn the key back far enough to remove the key.
    My wife just told me that a couple of days prior to this happening when she would start it the windows wouldn't work unless
    she turned off the car and restarted. Obviously I will start with the battery but it is fairly new, then to the alternator. Would
    a dying alternator cause it to run rough. Just thinking to myself. Any suggestions?


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  3. #2
    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
    Automobile(s): 2011 DTS Platinum
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    Re: Dead

    as the voltage drops, the electronics won't have the proper voltage to function correctly... so yes, it would probably run rough.

  4. #3
    wyosaddleman is offline Cadillac Owners Member
    Automobile(s): DTS
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    Follow up on DEAD

    So I charged the battery, the car started up fine with the check charging system light on, next I disconnected the battery as the car was running and it shut off instantly. In my mind that tells me the alternator is gone. Before I start to remove the
    alternator is there any other diagnosis I should look in to?

  5. #4
    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
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    Re: Follow up on DEAD

    Unless there is a wire loose causing the problem... looks like you get to replace an alternator...

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
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    Re: Follow up on DEAD

    NEVER disconnect a battery with the engine running - you have now possibly REALLY screwed up the alternator (voltage regulator) and/or the car's electrical system.

    A simple bad or high resistance connection - battery cable or alternator controls harness - could have been the problem in the first place.

    There is no need to start new threads on the same problem(s). Let one thread do the work. Similar earlier thread merged.
    Last edited by Submariner409; 03-03-14 at 01:33 PM.

  7. #6
    rodnok01's Avatar
    rodnok01 is online now Cadillac Owners Master
    Automobile(s): 98 DeVille, 97 DeVille d'Elegance
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    Re: Follow up on DEAD

    exactly what Bass has said dude, that can be the kiss of death unhooking the battery while running.


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