Question about 2002 Mercury Mountaineer

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I have a Mountaineer that has battery problems. The battery will discharge for no reason. The dealer has installed a new alternator and three batteries over the past four months. The battery will not even take a jump start. The dealer has sugested that we sell the vehicle. They have told us that they can't fix it and will no longer install a battery. Please help, Steve R.

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  • sromey Jan 02, 2011

    Your solution has already been tried. The Mercury dealer had the car for three weeks so the tech could test drive it. It was fine for three weeks and the one morning the new battery was so dead that it had to be replaced. I have removed the fuse for the heated seats to see if that is the problem. The battery has also gone dead while driving and left my son stranded on the road side. And my wife has informed me that the Mercury dealer has replaced the alternator twice, not once. Thanks, S. Romey.

  • sromey Jan 03, 2011

    Just like the local Mercury dealer, your expert is clueless. Thanks for trying. Steve R.


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Hi and welcome to FixYa!

That's sad to hear specially coming from the dealership. I suspect that there's a grounded wiring somewhere and a good auto electrician can be helpful to trace it out. There's no way it can't be fixed, there's always a way. If there are no electrical faults then I strongly suggest that you replace the car's computer.

The computer itself can be faulty which may cause electrical failure to the car. Without knowing that the charge is not holding up. Computer replacement is one good thing to consider and I believe you'll be good after the procedure.

Hope this helps and thank you for using FixYa! Have a good one!

Posted on Jan 03, 2011

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You have something grounding that shouldn't. Check the Positive battery cable all the way to the starter. Most likely there is a worn spot somewhere. If that is in good shape, check the wires that go to the alternator, especially any that may be near the motor or belts. If you have an After market alarm installed disconnect it if you have one of those "Thumper" amplifier or boosted power stereo systems installed that has that wiring in the engine compartment disconnect it, essentially anything that has been added should be removed, this includes LoJack if you have it. Once all the add on stuff is removed check the battery for drain. Once you have isolated where the problem is at you can put things back one at a time until you locate the actual problem device or problem circuit. You will need a Multi-meter, about $10 at Walmart to test continuity and voltage. Unfortunately this also includes any vehicle DVD devices or Navigation systems as well.

Posted on Jan 03, 2011

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Try to find why its discharging ?? firstly disconnect the two wires on the alternator ,and leave overnight to see if battery goes flat ,its a simple process of elimination

Posted on Dec 31, 2010

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Please give me a Fixya Rating.... I need to be a Guru !


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