Question about 2002 Lincoln Navigator

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"Like a fool" I thought my battery was bad so I

"Like a fool" I thought my battery was bad so I replaced it. 3-days later it went bad again. I connected a battery charger to the battery and "you guessed it reversed the wires". I again replaced the battery and the car starts and runs however, I am having problems, the fan is blowing full blast and the controls wont work. Additionally, the clock on the dash and some dash lights are out. All the fuses appear to be ok. Could I have harmed the Computer even though the car still starts, or do you have any other idea what I could have done. The battery charger is a older type and I dont know if it has a fail safe system if you reverse the wires. The vehicle is a 2002 Lincoln Navagator.

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To know if the computer is still functioning use a OBD2 code reader to scan your car. If you don't have one. GO to auto Zone and ask them to run the obd2 scan. Just a suggestion when you charge a vehicle battery always disconnect it from vehicle electrical system. If the clock and lights check the fuse first. most vehicle systems are routed though the ingnition key, So from that point you would need a wiring diagram to trace the systems that are having problems. The clock and some others are hot at all times this is the place to start checking for problem any system that is hot at all times. Chances are the problems have are not that serious

Posted on Oct 03, 2010

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Well, you haven't fixed the original problem yet, have you? The battery went dead twice, right? Must have a bad alternator or a short in the car. I doubt the battery charger did any harm, but i think you may have a bad alternator. Was the batt light on in the dash?

Please see my tip at http://www.fixya.com/cars/r5925550-dead_battery_troubleshooting . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 03, 2010

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It is time for your 9 year old car to need a replacement battery ... but ... that is not where I want to go with this ...

Disconnect a terminal on the battery (no matter which) and put a amp meter between the terminal and the cable and observe the reading. There is something on in your vehicle that you are not aware of. You can prove this by watching the amp meter reading.

Now then, best with the help of a friend, find the fuse box and one at a time, remove the fuses. When the amp reading goes to zero, you will have an idea what circuit requires more detailed attention.

Good luck with your project. Thanks for using FixYa.com

Posted on Oct 03, 2010

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You need to have the alternator tested if the SUV has over 40,000 miles replace the drive belt as well give these websites a try www.autozone.com and www.alldatadiy.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your SUV wish you the best of luck Michigan Man.

Posted on Oct 03, 2010

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Posted on Jan 02, 2017

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