"Commander Kinsey" wrote in message
news
On Fri, 12 Jul 2019 00:31:05 +0100, Rod Speed
wrote:
"Commander Kinsey" wrote in message
news
On Thu, 11 Jul 2019 23:43:38 +0100, Rod Speed
wrote:
"Commander Kinsey" wrote in message
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On Thu, 11 Jul 2019 22:30:05 +0100, Rod Speed
wrote:
"Rod Speed" wrote in message
...
"Commander Kinsey" wrote in message
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On Sun, 23 Jun 2019 07:03:33 +0100, Xeno
wrote:
On 23/6/19 5:43 am, Commander Kinsey wrote:
On Sat, 22 Jun 2019 20:08:46 +0100, Rod Speed
wrote:
"Commander Kinsey" wrote in message
news
On Sat, 22 Jun 2019 19:55:03 +0100, Rod Speed
wrote:
"Commander Kinsey" wrote in message
news
On Sat, 22 Jun 2019 19:14:07 +0100, Rod Speed
wrote:
No news to me, boy.
He's probably as old as you.
He isnt.
I've met Bod and he's (I'm about to insult him most likely)
very
very
old
indeed. I'd have to guess 80 to 90.
Thats just the furious drunken grave dancing and flagrant drug
abuse.
Smoking does make your face more wrinkly, but I'm sure he told me
his
age once.
For some reason I've always assumed you're about 70.
You're still wrong.
What is your age then?
And back on topic, I just bought a 16 amp 13.8V power supply,
that
ought
to keep the bloody frog car charged up. It's currently maxing
out
my
2.5A supply all night, and still not starting in the morning.
That's telling you your battery is knackered. Try a high rate
discharge
test on it. You will see it fall over very quickly.
Wrong yet again. I've changed the battery twice. It's consuming
power
overnight - presumably the alarm - I've actually measured up to 4
amps
(randomly, sometimes it consumes nothing) coming off the battery
with
a
meter when all the fuses are pulled.
Sounds more like a wiring fault. An alarm shouldnt
ever take anything like that when its not sounding.
But if it's broken....
There is no fault in an alarm that would produce a result like that.
I don't know enough about alarms to disagree, but couldn't it be
sounding
the alarm without noise as something is broken?
Nope. Its the sound that takes the current.
It if isnt sounding, there isnt the current.
A speaker with a short?
They normally use the car horn and you should be able
to check that that still works. And if it was the alarm,
that should stop the car being started next morning
and you have said it does allow you to start fine.
If you played your stereo into a shorted speaker, it would consume a fair
bit of power.
Its very unlikely to have a speaker for that even in a frog car.
It's never tried to prevent me starting the engine though.
Yeah, it wont be an alarm fault.
Can be a real bugger to find if its a pinched wire somewhere if it
isnt
obvious where a wire can be pinched like at one of the doors etc.
Surely a physical short like that would just burn out eventually.
Nope, 4A isnt enough to do that.
I can't see a loose wire doing that.
Its not a loose wire, its a wire jammed between two
pieces of metal with an edge cutting thru the insulation.
At some point it will either burn itself
Not with 4A it wont.
I would have thought a wire severed as you stated
I didnt say severed, I said pinched. The insulation pierced by the
metal edge with the conductor then shorted to the body of the car.
would use more than 4A.
Depends on the gauge of the wire and so the resistance
and how good the contact between the conductor and
the car body is.
Either that or part of it would become hot enough to stop being there and
shorting.
4A thru the car body isnt going to get hot.
or a fuse.
It cant be a fused line given that you still get
the battery flattened with no fuses installed.
Which means it has to be quite a heavy guage wire,
Nope, it may well be a relatively light gauge
wire and thats why it self limits at 4A.
so a low amperage seems odd.
Not when it self limits at that when pinched.
Guess it could also be a failing electric window switch.
Electric windows do have limit switches for obvious
reasons and they do take something like 4A when
driving against the limit switch until you stop pressing
the button because you see the window at the limit.
Presumably it does have electric windows.
It's been doing it for 3 years. 4A at 12V is 48 watts, a lot of power.
Think how hot a 48W bulb gets.
Thats with the entire 48W being dissipated in the
very small filament. With a pinched wire, thats
mostly going thru the metal of the car body.
Surely most heat would be where the resistance is highest, at the pinch.
Nope, not with a decent pinch.
How long does the 4A last for ?
It can flatten the (new 50Ah) battery overnight.
Sure, but I was wondering if it was 4A all night or just in bursts.
You really need a proper data logger to see that, but just visual
inspection of the multimeter might be enough.
After more thought, I'd be checking the electric window switches
if its got electric windows.