I drove my 2001 Windstar to work with no problem, went out to go to lunch and the engine would not start. Put battery charger on it, but it says it is fully charged.

did you check that battery is charging with a multi meter ? could be that your alternator has a fault . Icheck battery voltage with engine off and running , voltage should be approx. 12.48v with engine off and around 14v running . if no increase in voltage when running brushes in alternator will need replacing .

Hi, chances are you have at least one bad battery cable. Check them with an ohm meter. If you have any resistance in your reading, say above 0.02 change your cable. Hope that helps.

You need to have the factory security system scanned, it is most likely locking you out due to a fault.

need to load test the battery and test the starter..replace whichever is bad..

Check the cables. Did the test the battery under load?

Can you hear the fuel pump run, if not it may have failed again. I have seen new fuel pumps last a day or two and then fail. If your pump is working then replace the fuel filter. Anytime you open the fuel system, you should replace the filter.

Starter solenoid or just a starter bad, sometimes this comes out of nowhere but usually you can hear it start cranking slow shortly before failure.

Start by checking your battery cables for a good clean contact at both ends. Also check main fuses.

I would start by disconnecting the negative battery clamp and let it sit for a few minutes, then see if you still have the problem-if you do, get a digital meter and read voltage at the battery posts. If it is over 12.4 volts, turn the key to start with the lights on and see if the lights dim or go out completely. If they dim but will not turn the engine, you probably have a security alarm issue, if the lights go out completely, your battery is bad (bad cell or internally broken and shorted out). Can make more recommendations after these things are done.

tell her to not use the radio at lunch ..she is draining the battery...replace battery..recommend gel type with deep cycle rating highest you will afford and if she must ..run engine at lunch time to charge system