crappy battery

[DAMO_5L]

this is so crappy. my lights dim to the crapper and then they are ok then they dim then there ok. cd player has not enough power to turn on then it does. i couldnt start it yesterday then changed batteries and it went. now the battery light is on WTF is goin on???

[samuels]

this is so crappy. my lights dim to the crapper and then they are ok then they dim then there ok. cd player has not enough power to turn on then it does. i couldnt start it yesterday then changed batteries and it went. now the battery light is on WTF is goin on???

so battery light is on with new battery?
take the belt of,check for bearing noise on alternator,sounds like alternator may be on the way out,check and regulator all earth straps,

[defa]

sounds like ya need new brushes in the alternator. takes about 10 mins to put new ones in.. could be reg like samuels said too..

[DAMO_5L]

yeah its got a new battery and brushes in it. its pissin me off.

[samuels]

yeah its got a new battery and brushes in it. its pissin me off.

try all earth straps first, battery terminals are on tight arn't they
could well be regulator then

[dodgy]

put a multimeter on the battery
car off should be ~12.5v
car on should be ~14.5v
leave multimeter on when starting watch voltages drop while cranking

[DAMO_5L]

its all good i fixed it

[samuels]

its all good i fixed it

what was it ?

[samuels]

put a multimeter on the battery
car off should be ~12.5v
car on should be ~14.5v
leave multimeter on when starting watch voltages drop while cranking

it should be 13-13.5 all round,it only drops when motor actually running ,to 12 volts,this is how you tell a dicky battery,anything below 12 while motor running indicates a problem.

[dodgy]

it should be 13-13.5 all round,it only drops when motor actually running ,to 12 volts,this is how you tell a dicky battery,anything below 12 while motor running indicates a problem.

Are you sure @!

[hakhawk]

batteries will drop to anything around 8volts sometimes when cranking on most vehicles. but running the car should be around 13.8-14.4.

[dodgy]

"it should be 13-13.5 all round,it only drops when motor actually running ,to 12 volts"

[hakhawk]

lol, didnt read samuels post properly first, thought he said cranking at 12volts, but running at 12 volts? wtf? that there is sign of an alternator not working. mine runs at 12-13 volts when car is off, and goes to 13.8 when idling. which is the norm.

[PaRaDoX]

agreed, i used to get 3.5V all the time with my old battery =D
how much do alternator brushes cost???