hi folks, looking for some advice here.
I have a 2004 Honda civic diesel, recently replaced alternator (months ago) when it failed. At the time, i was getting 12.6v at battery when engine off, and the same idling. The new alternator fixed that and gave me 14+ volts when idling.
Now i have the battery light on again, and 11.5v with engine off and 10.5 volts with engine idling.
I suspect the battery is dead, but would you question the alt also? Due to the dip when idling? Thanks in advance