Trailblazer

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Commentator - 26 Feb 2007 03:18 GMT

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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Whitelightning - 26 Feb 2007 20:38 GMT

> BIL has a Trailblazer with a 4.2, '03 (?), ~95KM.
>
[quoted text clipped - 5 lines]
>
> 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

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Commentator - 27 Feb 2007 03:09 GMT

>> BIL has a Trailblazer with a 4.2, '03 (?), ~95KM.
>>
[quoted text clipped - 17 lines]
>
> 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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