Thread: voltage fluctuations DIC

I have just recently purchased a 07 GP GT. I love it. I had
a 99 GTP and have wanted another GP since I totaled out the 99.
Anyway, the first prob I have had is the battery. It had been on the
lot a while before I bought it and the pos post was badly corroded.
I noticed after charging the battery that the voltage on the DIC
would range from 12.8 to 14.56. Is this normal? I was just wondering
if it changes depending on the load. Every other car I have owned
has always had analog guages. I have since had to replace the
battery, but the voltage still fluctuates. I just want to head off
any problems...like being stranded with a dead battery again. So
far with the new battery I have not had any problems. Just need
some piece of mind. Any help is greatly appreciated.

Thats what I was afraid of. I guess that means a trip to the dealership for a alt check up. How often do the alts go out on these models? How accurate is the batt voltage on the DIC. I mean it seems to me that when it drops to 12.9 that the headlights would dim some...they don't.

sorry Blown97, I did not see your post. I guess I will just keep and
eye on it and if it does not give any probs I will not worry about it.

Thats the part I don't understand. This thing is doing everything just the opp of what it should. It shows 14.4 when I am driving at night with the lights, fan, radio and heated seats on. When I drove home today with on the radio and daytime lights on it was down to 12.9 when I got home. This is not at idle. But, it does not change much at idle. The next time I start it it might be at 13.8 or 14.5.
There just does not seem to be any conscistency at all. I had read somewhere on another site that the computer regulates the output of the alt. I was just wondering if it is adjusting the voltage to meet demand.