Electrical Question (Volts)

[Itsanemergency]

Hi Guys,

Question: I'm noticing that if I watch the guage in my car when I first go to start it and drive it reads 14.3 volts, and as I drive a little (5-10 miles) with AC, Lights, and Radio, it starts to degrade. By the time I'm back in the driveway it might only read 13.3 volts.

Should I be concerned? I haven't been stranded YET.

Thanks,

David

 

[berky2500]

There might be something going on with the regulator in the alternator. Maybe as it gets warmed up, the voltage drops. Find a place that checks the electrical system for free, Auto Zone or a Battery Warehouse or the like and get it checked, it might last for quite a while or might quit next week.

 

[vetteboy86]

The output of the alternator will be slightly higher while driving, because of the engine RPM's. 14.3 sounds about right for cruising. I am not sure what mine is at idle with all the gadgets on. I will try to do some checking and get back to ya

 

[dburgjohn]

The regulator should limit the output to about 14.3 volts no matter how high the RPM. It can however be lower. A reading of less than 12 volts means no output.

 

[WhalePirot]

Short answer.....NO

See: http://www.corvetteactioncenter.com/forums/showthread.php?t=48424