too bad my news server stinks... I dont have copies of all the posts that
are part of this thread...
Im wondering did the original person who asked the question ever get
One thing i wanted to say is the equipment I work on is by no means throw
away. Each control unit costs our customer over 10K the boards are
replacable but also repairable.
Oh well... it was a fun run we had,
The normal range is 12.60 to 12.75 on a fully charged battery that is stable.
With a key off drain, which every car will have the voltage can be seen as low
as 12.55. 12.50 on a stable battery is a in a low state of charge, this is
especially true if the vehicle has been in use, which the overwhelming majority
are. Possible reasons?
Driving time not long enough to bring the battery to a full state of charge
after a cold start.
Battery cable terminals loose or corroded.
A higher than normal ignition key off drain exists.
Excessive starter motor draw.
Defective or old battery.
High resistance in the chassis ground circuit.
High resistance in the charging system (+) power side.
That is only a few examples.
Although similar devices, a capacitor is not a battery, so it will not function
as one. Real bad analogy.
If the plates are shot, and some one changed the electrolyte, the OCV will still
show up as a red flag. The load test will confirm, so will the bounce back
voltage. No matter how you look at it, a bad battery is very easy to find, no
ned to wait 6 days.
This just shows the world that you know nothing, college boy or not. The
maximum voltage you could ever get on car electric's (other than spark
voltage) is 15!! What's this 480V??? In my career, I was an electronics
and software engineer for 10 years, and have been a quality assurance
engineer for the last 15 years dealing with military electronics, and have
used that knowledge to sort many electrical problems with a series of old
cars that I have owned.
And in case you didn't know, and clearly you don't, DVMs measure current by
measuring the voltage across a shunt resistor!! The shunt resistor is built
in the meter. You change the scale of the current measurement by changing
the value of the shunt resistor.
Seems to me that this is not tips for the news group but a personal argument
between Thomas and Ken, neither knowing what they are talking about.
Ken, are you listening? The input resistance of the car with the battery
disconnected is irrelevant and any conclusions drawn from any measurements
taken from it are erroneous for reasons already stated.
I'll think that I will bug out at this point. Over to you guys!
This is the newer, small Cougar, correct? If so, check out
www.contour.org. Try the forums, as there are many knowledgeable people
there. The Cougar is just a 2-door version of the Contour/Mystique/Mondeo.
There is also www.newcougar.org
If there is a no_junk in my address, please REMOVE it before replying!
All junk mail senders will be prosecuted to the fullest extent of the
heres a test for you... disconnect the "charged" battery from the car and
let it sit 6 days.. then start the car with the battery after reconnecting
it... if the battery wont crank the car well.. then its a battery problem..
if it does then its a car problem...
this can also be done by checking the input resistance of the car... but
forget that.. lets keep it simple...
Look very closely at your battery cables! Ford products are very prone
to corrosion INSIDE the terminal itself, not visible, where the cable
connects to the terminal. This presents a high resistance to the
charging voltage and may prevent the battery from receiving a full
charge. Eventually a vehicle with this problem will not start.
Movement of the cable while cranking sometimes will loosen this
corrosion and allow the vehicle to start. Replacement of the positive
cable is a quick and inexpensive method to eliminate this as a
possible cause of your problem. Replacement of the negative cable is a
little more involved, but normally the negative cable "outlasts" the
positive cable by several years. Good Luck!
I`ve once seen a car have the same problem and could not figure out what was
causing it to drain battery .
come to find out like 2 months later we did figure it out!!!
the car was parked on an inclined driveway. and the hood light was a merc
so car parked uphill in the driveway made the light come on which killed
car was in flat level bay . there was NO problem.
seriously the incline is like 70 to 80 deg.
car would sometime bottom out .
it is a driveway between to close houses to get to the basement apt.
the road is a hill to start with the an old 3 story house in town.
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