Electrical Fault - Volts/Amp
28 January 2007, 01:16 PM
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Electrical Fault - Volts/Amp
I need some help from someone who understands Electricity
MY95 STI is the car and it won’t start without putting to booster cables on it because the battery “seems” to be flat.
I fully charged the battery (it’s a new battery) yesterday from a battery charger, Volt meter and Turbo timer said it had 13.1Volts in it. 4 hours later the volt meter was showing 10.1 volts and that won’t turn the engine. ( leave the car longer and the voltage drops to 7 - 8 Volts) Putting the booster pack on it starts the car first go.
While the cars running the Turbo Timer shows 14.4 – 14.7 volts going into the battery.
Just spent the last 30 min putting to old battery back on which was charged to 12.3 volts and the car started fine. REALLY odd thing is the battery I’ve just taken off is reading 13.5volts. While connected to the car it only had 10.1volts! How’s that possible? What would cause a miss reading?
Is it a resistance thing? What sucks 3.4Volts from battery on standby?
Someone going to say something about AMPS, I know nothing about them!
How, Why and Where do I start to look to fix the problem?
If I put the meter across the battery a pull each fuse out, would I expect to see the voltage jump back to 13ish when the device sucking the Volts is turned of???
Any idea’s would be welcome.
MY95 STI is the car and it won’t start without putting to booster cables on it because the battery “seems” to be flat.
I fully charged the battery (it’s a new battery) yesterday from a battery charger, Volt meter and Turbo timer said it had 13.1Volts in it. 4 hours later the volt meter was showing 10.1 volts and that won’t turn the engine. ( leave the car longer and the voltage drops to 7 - 8 Volts) Putting the booster pack on it starts the car first go.
While the cars running the Turbo Timer shows 14.4 – 14.7 volts going into the battery.
Just spent the last 30 min putting to old battery back on which was charged to 12.3 volts and the car started fine. REALLY odd thing is the battery I’ve just taken off is reading 13.5volts. While connected to the car it only had 10.1volts! How’s that possible? What would cause a miss reading?
Is it a resistance thing? What sucks 3.4Volts from battery on standby?
Someone going to say something about AMPS, I know nothing about them!
How, Why and Where do I start to look to fix the problem?
If I put the meter across the battery a pull each fuse out, would I expect to see the voltage jump back to 13ish when the device sucking the Volts is turned of???
Any idea’s would be welcome.
Last edited by BlackWrxScooby; 28 January 2007 at 01:19 PM. Reason: spelling error
28 January 2007, 01:19 PM
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sound like battery is fooked..
a battery can have VOLTS without holding AMPS
AMPS is what gives the power to turn your engine over not VOLTS
id take said battery to a shop who sells them or a tyre exhaust place where they will do a "DROP TEST" to see if your battery is any good
hope that helps
a battery can have VOLTS without holding AMPS
AMPS is what gives the power to turn your engine over not VOLTS
id take said battery to a shop who sells them or a tyre exhaust place where they will do a "DROP TEST" to see if your battery is any good
hope that helps
28 January 2007, 01:26 PM
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as above, because volts are present does not mean all is well within the battery.
as soon as a load is connected, however small, these volts will drop away if the battery is shagged.
is the battery short on water????
and as said, a proper 'drop' test is the way to prove it, this is basically a large resistive load put across the terminals to see how well it holds up.
as soon as a load is connected, however small, these volts will drop away if the battery is shagged.
is the battery short on water????
and as said, a proper 'drop' test is the way to prove it, this is basically a large resistive load put across the terminals to see how well it holds up.
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