On Wed, 23 Dec 2015 03:46:41 -0500, Micky
wrote:
On Tue, 22 Dec 2015 19:48:09 -0700, rbowman
wrote:
On 12/22/2015 07:08 PM, wrote:
Anyone have any clue what's happening. I sure dont!!
This is a long shot. Do you have a meter to verify the positive terminal
is in fact positive? It's rare but it is possible to reverse the
polarity on a discharged battery by connecting it backwards.
Don't you mean to say that it's possible to change the polarity of a
generator (not an alternator) by connecting the battery backwards,
even for a short time?
At any rate, you're right about the meter. He should measure the
voltage of the battery without the charger, with the charger, without
the charger when cranking the starter motor.
If low charge, or a bad battery, is really the problem, the voltage
will drop too much when cranking the starter.
(With a car, I don't need a meter and don't need to get out of the
driver's seat by trying to blow the horn while cranking the engine. I
do this test when the car won't crank. If it doesn't blow well, it's
the battery. It if blows well, the starter isn't even engaging
electrically, so its the starter circuit or the sstarter.)
It's the farm tractor part that makes me suspicious:
http://fergusontractors.org/fena/wp-...-Generator.pdf
Yeah, a gnerator. Not a battery.
Like I said, it's a long shot that the entire system might have been
reversed.
That only works if the battery is reversed, connected backwards. Maybe
it is and the OP is going by the post positions, which are reversed,
so he should look at the embossed + and - next to the battery posts.
Those are always accurate.
No they are not. If a battery has gone dead it can be charged either
way. If the battery was dead and the generaztor had lost it's residual
magnetism and was polarized backwards, the terminal markings on the
battery will be wrong, and the battery will not produce the full rated
cranking capacity because the pos plates are charged neg, and the neg
plates are charged pos, and the plate chemistry is different + to -