Battery power falling

[GTE TURBZ]

Hi guys, I've changed my alternator and now recently put a new battery in yet occasionally the cars battery power drops making it barely possible to start, before i changed the battery if the power fell i'd rev it hard and then it would go back up and sit just past the half way mark so thus i changed the battery, but even that didnt resolve it. I'm actually suspecting my head unit, will have to disconnect it and try.

Any have an idea or experienced this problem? :thumb:

[novaguy08]

did you fit a new new one?
thats a confusing one, check that your voltmeter is right with...... erm a voltmeter but put this on the battery, watch for the drop in voltage on your in car one and see if the battery does the same

[GTE TURBZ]

if your refering to the alternator then that was a refurbished one.

[novaguy08]

ok most of them in circulation are refurbed ones, but you need to check that the voltmeter in the car is reading correctly before you start condeming the battery and alterator

[GTE TURBZ]

I think the gauge is ok because when its low the car just about starts. I'm gonna try the sterio and then do the volt meter test.

[GTE TURBZ]

Sorted, turned out the battery light was not working on dash! hence didnt trigger the alternator!! supposedly

[GTE TURBZ]

Sorted, turned out the battery light was not working on dash! hence didnt trigger the alternator!! supposedly