electrical problem, battery??

hello

so i got another frustrating problem!

this morning as i was driving too work i was flicking my high beams on coz i saw a mate driving in the opposite direction and my radio switched off for a split second and my car was misfiring.

then i went to leave work and the radio presets had been lost and dash clock has reset?

so i got home and locked the car with just the key and a click noise came from the engine bay, i unlocked the car and went to start it and no interior lights were on and the car wouldnt start, fuel pump wouldnt prime. as if there was no battery at all nothing happend. then it worked again after i locked the car again and unlocked it.


battery is 14ish volts on idle, drops to 12 when high beams go on then slowly bak to 14 volts..

then i put all electrics on (AC, radio, rear demister, all lights, ect)
the lights on the dash dimmed, engine rpm dropped to lower then idle and car stalled.

what the fcuk

Has it got immobiliser? Maybe loose battery terminals messing with the alarm?

Huge stab in the dark

have you load tested the battery? testing the charging system is fine, but a charging system charging a faulty battery could be one of the causes, something to look into

it does have an alarm/immo but i dont arm it..

na-118, by load testing the battery do u mean putting lights on, AC on ect? if so yes i did.. voltage dropped, lights dimmed and car switched off on idle

putting the lights on while car is on does put load on the battery, but by load testing the battery individually is better, you'll need a load tester if its a durst tester you put half the CCA on the test, if you got a digital tester it will tell you which cell is rooted, or low charge, overcharged battery etc

oh thanks for that, i just have a multimeter at home.
ill swap over my sisters battery into my car and see if it happens..

Thanks for The help guys, I took a stab in th dark and bought a new battery,
Problem solved :)

Gotta love new batterys, 90% of the time solves a lot of problems...even though they cost $130+++ for our cars -____-

they cost 130+ for all cars...

Update,

Piece of shit starting to play up again!!!!!?

so not the battery after all?

Nope, it was fine for 1 day,. Now fuking up like it did with the previous battery