. since then my battery won't hold a charge overnight . the battery's fine, altenator's fine , and starter are fine . personally I was told it could be a fuse or something electrical ?? It run's fine once it's jumped and hold's the charge during the day while i'm using it but something is drawing it over night any suggestion's please ??
you can test for a parasitic draw by using a digital multi meter $20-30 from autozone the booklet that comes with the meter will show you how to set it up to test amps! disconnect the negative batt cable touch one lead to the neg post on batt and the other one to the neg cable watch the reading it gives while having a friend pull one fuse at a time. normal draw is .3 to .5 amps (pcm memory) when the reading drops off the component that fuse powers is draining your batt!
Sounds like you've got what they call a parasitic draw. That means there's some component on the car that's continuing to draw power from the battery while the key is off. I can safely say its not a fuse because when a fuse blows it stops whatever current draw made it blow. On an Explorer first thing I'd check is your ABS pump. To check it shut the engine down then listen for a hum just below the master cylinder in the unit mounted on the frame. It'll be the one that has several brake lines coming from the back end of it.
it sounds like from what u say that something is drawing power if u cant find the draw chances r its ur alternator diode burnt out so the alt will need to be replaced the way to test this is using a multi meter with the unit shut off check both sides of the alt for power only should have power from the battery to one side of it good luck hope this helps
