Join Date: Mar 2008
Location: Downers Grove, Illinois
Re: battery not staying charged
If you car is original, disconnect the positive while it is running. If it dies, your alternator is bad. Have everything off inside the car. "Don't do this on todays cars." Based on what you said above, the chances are slim that your car will still be running. This is true because you said it died while STILL runnning. You don't need the battery after you start the car on your first gen. But, leave it in the car!!!!!!!!!!!
If it is still running, you will have a bad battery most likely.
If you can not test the draw, disconnect the ground on the battery the next time you let it sit. If it is dead or weak after a few weeks, it is a bad battery also. You will be amazed at how many new batteries are bad today. You have not said how old your battery is?
I can tell by your question that you do not have any test gauges or volt/amp testers. You can do an even better test with them. They are pretty cheap. Lots of the parts stores have load testers also and this test equipment. There are lots or write-ups on how to "professionally" do this testing. You will also find that many of the pros are not good at really testing this out.
The info above is to help someone that is not experienced at testing for both the alternator and battery. You will actually find it very helpful and reliable as a "simple quick test."
67 R/S Coupe, Sierra Fawn
Last edited by Dale8346; May 30th, 09 at 11:40 PM.