Mitsubishi: Magna charging problem?

Have you had checked your alternator ?? sounds like no charge is being
returned to the battery ????

Peter

"barry lawson" <com.au> wrote in message
news:42a254ac$0$27848$optusnet.com.au... 
charge 
period 

It could be the regulator. An overcharge situation is worse than an
undercharge. I'm not familiar with that vehicle, but you probably need to
replace the regulator. Unfortunately, Mitsu doesn't normally make this easy.
You will probably have replace the alternator or rebuild it if you can find
the parts.

--
Todd Honea
"barry lawson" <com.au> wrote in message
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charge 
period 

Nobody U. Know wrote: 
I just went through an "overcharge" problem on my son's Eclipse.
Battery acid everywhere, from boiling the battery.

While it looked like the regulator was at fault it wasn't.(I ended up
bench testing it, and it was OK).

What appeared to be the problem was the third wire running to the
alternator, the one labeled "S".

This is the wire that runs directly to the battery, and provides the
"sense" circuit for the alternator to monitor the battery voltage.
If this wire is open, the regulator in the alternator has no idea of the
condition of the battery. The default assumption is that the battery is
low and needs a charge. The regulator then turns on the alternator
output to charge the battery, via the "B" labeled output lead. When the
"S" signal reaches 14.38 volts, the battery is charged and the regulator
should turn off the alternator.

A voltage on the "S" lead, greater than 14.38 volts (as measured in a
lab environment with a 4 1/2 digit meter) should turn off the alternator
output.

I figure I had a loose or bad sense ("S")lead, as the trouble went away
after I had disassembled the alternator and tested and cleaned
everything inside it, as well as cheched all the wires at the alternator.

On the up side, I did figure out how to test the alternator, and the
regulator on the bench, without a car attached.

"Nirodac" <com> wrote in message
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