[Vwdiesel] re:moving on/alternator update!
S. Shourds
sshourds at flash.net
Sat Nov 19 12:11:33 EST 2005
> Here's what is really interesting, i found while visiting a friends
> repair shop, whom used a cool "snap on" anylizer, the alt is putting
> out 14.4 volts, great! this great tool also says that somewhere in the
> system i am giving back more voltage. discharging battery.
> Back at my home i did the old "light in between the positive cable and
> battery" test light. found
> no drain of current, put the head lights on just to make sure the test
> light worked and it did.
Years ago, when I was in grad. school, the fairly new battery in my '80
Rabbit died. I took it back to the Sears where I'd bought it to get a
new one and a refund of the pro-rated warranty. The guy in the shop
clamped his inductance ammeter over the battery cable and said, "Well,
there's your problem. You've got a 1 amp draw and that's what killed
your battery. We can't warranty that." Dad was with me and said that,
yeah, 1 amp's a lot and that's just how it is. Bummed, I paid for the
battery and drove home. Hours later, I pulled out my milliammeter and
put it in line with the battery. Not typically the best idea because
any real current draw would leave me with a molten meter. I looked at
the needle and it was swinging back and forth to maybe 10 milliamps.
Swinging like a clock pendulum. Clock. Like the quartz clock in the
dash. Like the only device using any power whatsoever. So, what I
found out is that an inductance ammeter is a very expensive and
inacurate (at low current) tool used to fool people into thinking that
they need to buy a new battery and pay to find the current leak.
-Shalyn
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