[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: Battery undercharged
While we are on the topic of the Auid's charging system. I would like to
ask a simple question which about the alternator on my '87 5kcst. After
a couple of months of observation, I found that my one year old
remanufactured alternator started making some noise when under load;
such as the rad. fan kicks in; whenever the load increase; such as everything
are turn on with the rad. fan kicks in, the noise will become more
obvious, but after I turn off all the things(not the engine) and the rad.
fan stops, the noise disappear.
Is that means my alternator going south again? or It's just normal?
On Fri, 6 Dec 1996, Graydon D. Stuckey wrote:
> On Fri, 6 Dec 1996 STEADIRIC@aol.com wrote:
> > >weeks. I
> > >had the battery checked and the verdict was the battery was okay, but
> > >undercharged; I should have my charging system checked, or drive more.
> > I hear you on this one and was thinking of trying the kit to see if it
> > helped.. I also found that by doing a "Maintence" charge on the battery
> > once or twice a month I don't have the problem.......
> I don't think this should be necessary even on the 5000CSTQ with
> all its toys. I had to get a new battery and a rebuilt alternator, but
> after that, my entire system ran fine. In the course of the
> troubleshooting, I checked current draw in every circuit in the fuse box,
> both under normal operating conditions, and with the car off. There are
> very few really high draw circuits on the 5000, and the current when off
> was less than 25 milliamps which is right in the ballpark for most luxury
> cars. Interestingly, the display on my radio drew almost half of that 25mA.
> Now, I admit, the 90 amp alternator doesn't produce 90 amps until
> you have it revved up a bit, but if you put a voltmeter on the alternator
> output instead of looking at the HVAC display, you'll find that even under
> high load, with the blower, lights, seat heaters, and the rear defroster
> running, teh voltage only drops to 13.5 at the lowest. As long as you're
> staying above 12.7 volts, you are still charging the battery, and not
> drawing from it.
> Later, ----------------------------------------------------------
> Graydon D. Stuckey '85 Mazda RX7 GS, no toys
> firstname.lastname@example.org '86 Audi 5000 CS Turbo Quattro, has toys
> Flint, Michigan USA '89 Thunderbird SC, lotsa toys