Originally Posted by Sharpie
Thanks for everyones help. I checked the voltage at the alternator last night and it was a solid 14.5v and about 13v at the battery. This weekend I will check the connections and resistance in the wires. Is there anything in particular I should look for?
Yes I agree and a bad and varriable contact or wire could cause this.
But the car started fine when the battery was at 13v+.
This says the starter is at least good when the battery is good.
OK so the Alternator is reaching or is near its max voltage controlled by the voltage regulator. So voltage regulator is good.
I am very worried about your measured battery voltage dropping, you say
"Originally Posted by Sharpie
After charging my battery it read 13v when it was off and the car started perfectly. The battery read 13.5 when it was running. Now a day later the battery reads in the high 12's and is beginning to start sluggishly again."
So for some reason the voltage dropped on the battery, it should not do this unless you left the lights on or ran the car and exceeded
the output of the Alternator for some time, lights stereo etc.
SO did you do this ? If not check that your Alternator belt is not loose and slipping. Although this is not the problem with the newer cars it used to be a problem. And of course its worse if the battery gets low for some reason. The red light does not nornally come on if the belt is slipping under load because the Alternator is still giving output, but at a lower rate.
If belt is tight and in good condition, not glazed, then we are back to the Alternator current output being low.
Does the red light ever flash if you rev the car up high, ie 4000 5000 rpm ?
If so it is bad.
Let us know how you are doing...