Re: Automotive Circuit Protection - Part 2

["alexpeper" <alexpeper@email.msn.com>]

I have been a professional jumper also pass 16 yrs. Would
worry more about the dead jumped car than jumper vehicle,
since cars were Euro models with $5000 computers.  Would use
a deep cycle marine battery.  if not enough power to crank
then
run jumpers to marine battery in parallel.  Many cars
especially 80's had warnings not to jump start and
disconnect battery before using battery charger, but did not
see any warnings about using vehicle to jump other cars.  I
do not think I have ever
turned off engine while connecting or disconnecting, I guess
mainly to cold out.  I did witness(hear) a H2 battery
explosion
while connecting and seen a few Snap-On chargers die.
Alex
----- Original Message -----
From: Bruce Plecan <nacelp@bright.net>
To: <gmecm@diy-efi.org>
Sent: Monday, June 26, 2000 4:20 PM
Subject: Re: Automotive Circuit Protection - Part 2


> Corfuses me.  Worked at tow co.s for a long time, never
shut em off to jump.
> Years ago, so while the electonics for ecm wasn't there,
was the older
> gnerations of alternators.  granted the trucks had the big
charging systems,
> and huge batteries.  As I recall, we did all the cables
with 00 wire.
> Grumpy
>    Speaking from the Peanut Gallery
>
>
> > Very true, which is why I never start the vehicle that
is doing the
> > jumping, since it will be the one that takes the hit
when pulling the
> > jumper cable(s), when the starter disengages, or there
happens to be a bad
> > connection! BTW, that amount of load dump may well
indicate a (small)
> > battery problem.
> >
> > At 09:47 AM 6/26/2000 -0400, you wrote:
> > >Hi Garfield, et al:
> > > Ive measured loaddump WAY above 70V, here is the
scenerio, jump starting
> > a car.
> > >Car A is running ~3000 rpm Vbat ~14.4, car B cranks
draw the combined A
> > and B
> > >voltage down to ~9. Alternator is now pumping out Max
power. When the
> > starter
> > >is released  on car B the alt in car A is still putting
out max power,
> even
> > >with the battery I measured +186V.
> > > I took the alt back to get it tested and was told that
the magnetic
> field
> > takes
> > >time to decay, AND there is a small delay before the
regulator can
> respond.
> > >
> > > Otherwise I agree with everything you've said
> >
> > Thanks,
> >         Peter Hipson (founder, NEHOG)
> >         1995 White NA Hummer Wagon
>
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