Question about 1999 Ford Windstar

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No power but full battery

My battery is fully charged, I have power to both fuse boxes, but I have no power to anything else. Won't start, and no lights come on.What could cause this?

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Check the ignition switch...not the key and tumbler assembly but the electrical part...also try to turn on headlights...if lights work you have power to the passenger compartment...if not check bulkhead connectors...(where wire harness passes through firewall)

Posted on Apr 01, 2014

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Bad fuses or wiring problems are high on the list. Check the ground cable for loose ends at the battery, body and engine block. Could also be a fusible link... Time to buy a manual and start chasing electrons.

Posted on Apr 01, 2014


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SOURCE: 2001 mustang gt,all access. work fully charged

Check your neutral safety switch with test light.

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SOURCE: 1996 Ranger alternator tests prove

I would replace the alternator. The test might of proved it was ok but that just checks to make sure its putting out the amperage its rated at. Sounds like its shorted internally and putting out full amps all the time.

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SOURCE: clicking in fuse box under hood

That test with the Hydrometer of battery specific gravity will indicate the state of charge, the problem is this, the battery posts that connect to the cells inside the newer sealed batteries burn through, so although the battery is charged there is no way to deliver the power to the car, that is why a load test is the only true test of battery performance. Most auto parts stores do this test for free.

Posted on Dec 06, 2011

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I would check for voltage at the starter from the battery and from the key switch via the neutral safety switch.
If there is no voltage at the starter from the battery check the fuseable link wires and the ground connections.

Posted on Sep 07, 2012

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