Alternator died and battery is reading 19volts?! Any ideas

[Paddy_g46]

After my thread last week: http://www.cliosport.net/forum/showthread.php?t=477353

Havn't got around to fixing the problem but I just removed the battery to charge it and the battery is reading 18-20 volts?

I'm sure this isn't normal! it doesn't even have enough power to operate the central locking!

Any ideas on this?

Patrick

 

[mark_sport172]

Think anything above 14volts is ok.

 

[iimushroomzii]

Earths all ok on the car?

 

[VXR killer]

just because a battery reads ok voltage doeasnt mean the batterys ok, its the ampage that you need. if youve got no ampage in the battery then its buggered.

 

[Kenned4200]

The battery CANT read 18-20v, its just impossible for a 12v battery.

 

[scotty2hotty81]

^^^^^^^^^^^^^^^^^
What he said

 

[Paddy_g46]

The battery CANT read 18-20v, its just impossible for a 12v battery.

But it is....?!

 

[roy brown]

a new or fully charged batt reads 12.50/13.00 the average alternator only puts out 14.3 so it should never go that high do yourself a favour and buy a new batt

 

[sideways danny]

i've seen them measure 16v, just means they're stuffed

 

[Dink]

is the multimmeter ok?

check it on something with a known source

 

[brakesy]

yea is the voltmeter calibrated cos that will give u a false reading on it but the battery might still be shot!

 

[LouisQ]

Sounds like the reg in the alternator is fubared?

 

[Paddy_g46]

checked the voltage on my house sockets and its reading 240 so im sure its all good!

 

[Dunn]

a battery is actually 13.2 volts
contarry to what people think
but they should run at a minimum of 12 volts
sayin that i havent seen one at 18 volts
ill ask the brains tommorow

 

[jenic]

checked the voltage on my house sockets and its reading 240 so im sure its all good!

Haha, bet you didnt use fused leads/approved tester lol

 

[Paddy_g46]

Haha, bet you didnt use fused leads/approved tester lol

lol, well i need to check this meter im using so that wasn't really an option!

 

[pablo.87]

Probably your regulator internal in your alternator,causing your battery to overcharge,deffinately can overcharge to 19 volts, if your battery is being overcharged look for your battery becoming warped and smelling. Could do with testing the voltage when driving see how the voltage changes.Just my opinion.

 

[scotty2hotty81]

if the alternator is over charging you will have electrical issues with the car, mine spiked 16.2v every now and again, my headlamps would go off then on and all my dash lights would flicker.

 

[pablo.87]

Would this be the same for a valver since it's not as modern as a 1*2 tho?

 

[Lagerlout]

Haha, bet you didnt use fused leads/approved tester lol

GS38 is only an advisory

 

[brakesy]

GS38 is only an advisory

i can see this getting picky with electrical guidelines!!!!!

 

[Paddy_g46]

Turns out my voltmeter was reading wrong!

I measured my mates car which was 12v and 14v with engine on. The checked my battery and it was 8.2v In conclusion, im thinking a new alternator shoudl sort it!

A battery with only 8.2v wouldnt be enough to power any electrics right?

 

[scotty2hotty81]

sounds like you need both battery and alternator, a flat battery can read 12v still.

 

[Mike_182]

It wouldn't run your misssus' dildo at 8.2v, no.

 

[mark_182_54]

mines ticking over at 7.3 and running everything ???!!

 

[Tony Hunter]

Our car when it was on the rolling road suddenly went to 18v,turned out to be the regulator