Ok, here's what I'm finding.
On 8/25/2010 with engine cold and outside temperature about 90 degrees F:
13.32 vdc at battery posts engine not running
14.56vdc with meter at battery posts with engine running @ 1500 rpm
14.8vdc with battery negative cable off, engine running, with meter at positive post to a ground
14.5vdc with battery negative cable back on but loose, engine running, with meter at positive post and to a ground
With engine up to operating temperature (idling @ about -1k)
14.12vdc with meter from ground to positive battery post
13.8vdc with engine running, and a/c on maximum
13.08vdc with engine running, a/c on maximum, and headlights on
12.9vdc with engine running, a/c on maximum, and headlights on high beam
12.9vdc with engine running, a/c on maximum, and headlights on high beam and radio full volume(cool tunes play'in)
With engine still running this time rpm @ 1k+
13.5vdc a/c on maximum, and headlights on high beam and radio full volume(cool tunes play'in)
13.79vdc a/c off and high beam and radio full volume(cool tunes play'in)
Is my alternator doing what it should or should the voltage still be higher?
Is my battery ok?
Noticing when the a/c is turned on, the rpm drops below 1k, also the voltages lowers. With a/c turned off, rpm rises to 1k+ and voltage rises as well. Could I adjust the idle on the throttle body to keep rpm @1k?
Wednesday, August 25th, 2010 AT 12:25 PM