Thread: diagnosis help - new engine noise that wasn't there yesterday

Originally Posted by LandyAndy

Hi Brian.
Did you deal with that horses head yet??????
Go to Jaycar,for about $20 you get a ciggy lighter voltage meter.Will give you an idea what the alternator is up to.Bare in mind these are electronicly controlled.They don't charge normally.When the battery is full or pretty full they only charge off throttle so you may not see many volts all the time.should show 14.6 or so when it needs charge all the time.Will show around 12.6 if its happy,that will increase up to 14.6 on the over run to use up spare energy.Not that you haven't got some to spare!!!!
ENJOY
Andrew

Cheers Andrew - good advice. will do

I use the Jaycar plug Andrew is talking about.

FYI & fwiw I've never seen less than mid 13 with the engine running. Usually it's high 13 low 14. As Andrew says on the over run it will jump to 14.9.

I'll be concerned when that changes.