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Discuss Trailblazer in the alt.trucks.chevy forum at Car Dealer Forums; BIL has a Trailblazer with a 4.2, '03 (?), ~95KM. Voltage gauge 'pulses', swings up ...
  1. #1
    Commentator
    Guest

    Default Trailblazer

    BIL has a Trailblazer with a 4.2, '03 (?), ~95KM.

    Voltage gauge 'pulses', swings up and down, sometimes between 13.5 - 14.5,
    other times between 9 - 15. He removed battery ground with the engine
    running, no change to behavior. No codes.

    Voltage regulator?

    TIA






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  2. #2
    Whitelightning
    Guest

    Default Re: Trailblazer


    "Commentator" <Commentator@NoSpam.com> wrote in message
    news:bksEh.3440$Xp.1433@fe12.usenetserver.com...
    > BIL has a Trailblazer with a 4.2, '03 (?), ~95KM.
    >
    > Voltage gauge 'pulses', swings up and down, sometimes between 13.5 - 14.5,
    > other times between 9 - 15. He removed battery ground with the engine
    > running, no change to behavior. No codes.
    >
    > Voltage regulator?
    >
    > TIA
    >

    Sounds like the voltage regualter whicvh is part of the alternator. also
    tell
    him to be ready to place the ecm since he tried a test metyhod that went
    out 30 years ago. Disconnecting the battery while a vehicle is running and
    then
    reconnecting it causes massive voltage spikes which cook computers. Hell
    jhooking a set of jumper cables up without shuting the donar vehicle off
    first can
    cook computers. same with disconnecting them.

    Whitelightning



  3. #3
    Commentator
    Guest

    Default Re: Trailblazer

    Whitelightning wrote:
    > "Commentator" <Commentator@NoSpam.com> wrote in message
    > news:bksEh.3440$Xp.1433@fe12.usenetserver.com...
    >> BIL has a Trailblazer with a 4.2, '03 (?), ~95KM.
    >>
    >> Voltage gauge 'pulses', swings up and down, sometimes between 13.5 -
    >> 14.5, other times between 9 - 15. He removed battery ground with
    >> the engine running, no change to behavior. No codes.
    >>
    >> Voltage regulator?
    >>
    >> TIA
    >>

    > Sounds like the voltage regualter whicvh is part of the alternator. also
    > tell
    > him to be ready to place the ecm since he tried a test metyhod that
    > went out 30 years ago. Disconnecting the battery while a vehicle is
    > running and then
    > reconnecting it causes massive voltage spikes which cook computers. Hell
    > jhooking a set of jumper cables up without shuting the donar
    > vehicle off first can
    > cook computers. same with disconnecting them.
    >
    > Whitelightning


    I was thinking the same thing on removing the cable, but he didn't ask, he
    just told me about it after the fact.

    Thanks.




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