Charging issues

[luvemfast]

Hi guys

I've had a problem with the Z's electrical for a while now.

I get some dash warning lights come on. Charge, door, oil and 1 other (can't remember off top of my head). At first I thought it was just a loose connection.

It also doesn't hold charge, the battery goes dead. Even after driving it.

I have noticed the warning lights are OK at idle, comes on at revs. The voltmeter at idle sits around 12V and goes up to 14ish. I've checked this with a multimeter too. So makes me think the alternators OK.

It does have an under run balancer pulley on it, for higher RPM usage and not overspinning alternator.

 

Any idea's on where I should be checking next?

[Zedman240®]

12 at idle isnt good, it should be at least 13.8ish and even while revving, be around 14v. If you can do a load test/CCA rating test done on the battery first, then check actual output of your alternator/reg to make sure its charging.