PLEASE HELP alternator

[chewit]

HEY GUYS, BATTERY LIGHT CAME ON LAST NIGHT ON WAY HOME FROM WORK , WHEN I RETURNED TO IT THIS MORNING IT WENT OUT SO GOT SOME METER READINGS FROM THE BATTERY ,LET ME KNOW WHAT YOU THINK PLEASE AS I AM A BIT OF A NOOB

BATTERY VOLTAGE WITH IGNITION OFF -12.65

ENGINE RUNNING (IDOL) -14.36

HEATERS AND LIGHTS ON - 12.93

HEATERS AND LIGHTS WITH RADIO - 12.50

AS YOU CAN SEE THE MORE LOAD I PUT ON THE MORE THE VOLTAGE DROPS, ON A FULL LOAD THE VOLTAGE IS LESS THAN THE BATTERY WITH IGNITION OFF I QUESS THIS IS WHY THE BATTERY LIGHT CAME ON. I RECENTLY INSTALLED SUB AND AMP

HERES WHERE I NEED HELP . IS MY ALTERNATOR KNACKERED DO I NEED A NEW ONE OR BIGGER ONE (IF THERE IS SUCH THING)

THANKS FOR YOUR TIME

[WallaceGlanza]

HEY GUYS, BATTERY LIGHT CAME ON LAST NIGHT ON WAY HOME FROM WORK , WHEN I RETURNED TO IT THIS MORNING IT WENT OUT SO GOT SOME METER READINGS FROM THE BATTERY ,LET ME KNOW WHAT YOU THINK PLEASE AS I AM A BIT OF A NOOB

BATTERY VOLTAGE WITH IGNITION OFF -12.65

ENGINE RUNNING (IDOL) -14.36

HEATERS AND LIGHTS ON - 12.93

HEATERS AND LIGHTS WITH RADIO - 12.50

AS YOU CAN SEE THE MORE LOAD I PUT ON THE MORE THE VOLTAGE DROPS, ON A FULL LOAD THE VOLTAGE IS LESS THAN THE BATTERY WITH IGNITION OFF I QUESS THIS IS WHY THE BATTERY LIGHT CAME ON. I RECENTLY INSTALLED SUB AND AMP

HERES WHERE I NEED HELP . IS MY ALTERNATOR KNACKERED DO I NEED A NEW ONE OR BIGGER ONE (IF THERE IS SUCH THING)

THANKS FOR YOUR TIME

Certainly sounds like the alternator has gone, you should still be getting over 13volts with the ancillaries on whilst running.

[llawgoch]

did u pick the revs up a little with all the accesories running, if the volts pick up when u bring revs up to about 1500 rpm then theres nothing wrong with it

[lukEp]

under full load at 1500-2000rpm voltage should be no less that 13.50volts really deffently should hold if it slowly drops off its not charging

http://www.ukstarletclub.com/forums/index....t=0#entry417177

^^^^^^^^