Question about 2004 Jeep Liberty

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04 Liberty 3.7 v6 I put battery cables on reversed. blew fuses for interior lighting and fried alternator. I have replaced these now but the battery is low and will not charge. I started the car with a boost but it would not run properly

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Their is additional electrical damage. You could have done as little damage as blowing the main fuse 100amp or so, or there can be major damage such as destroying computer related components. This is a complex problem an you will have to have access to a computer scanner that can read live data which will require you to be familiar with engine sensors and electrical components. I do not recommend you tackle this yourself unless you have some level of automotive technical training.

Posted on May 29, 2011

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I was jumping my 1995 Geo Prizm and my friend put battery posts backwards on his battery now my car has no dash lights nothing can you tell me what this is

You blew a Fuse!!! THAT'S WHY THEY recomend to put the black negative wire cable to the engine not the battery the ECU could be compromise if you dont, lucky for you its just the fuse or the wheel that makes it brighter and turns your interior courtesy lights on, .good luck.

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Hooked battery up backwards

You need to take the Alternator in for a Bench check. The diodes are probably bad. Wiper switch or motor can be bad. Radio can be smoked.

For wiper motor, the contact points use a system where a derailer mechanically shifts the points to break contact. The contacts are probably fused.

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Battery voltage low on 2003 jeep liberty 3.7 just changed altenator and battery

you reverse the battery cables?
you remove the alternator before pulling the battery NEG. LUG?
if you do pulled the alt, with out lug pull that blows a huge fuse.
battery voltage low and no voltage stated, nor how taken. (crankiing or not or both)
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my guess is this is a NO CRANK post .?
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Nov 29, 2013 | 2003 Jeep Liberty

2 Answers

93 miata, only the headlights work. it keeps blowing the btn fuse as soon as i put it in. are the diodes bad on the alternator?

Hi Lee and Chuck, Seems you have a serious short circuit in your vehicle. The fact that when the vehicle stands it will need to be jump started would seem to confirm the same. The power seems to be draining somewhere! The fuses which blow will give an indication of which circuit is shorting. If your brother wired in a music system or radio, disconnect it and then see if the fuses still blow? If they stay fine you know where to start. The music system is connected to the lights for night illumination of the controls. It may be that the earth connection has been mixed up with a power cable? If the vehicle runs fine during the day and does not give problems when restarting, it would be doubtful that there is damage to the alternator. You can check it fairly easily by connecting a test meter to each of the terminals. Start the vehicle and if while cranking the voltage drops below 8 volts, get the battery replaced. If it remains at about ten during starting that's fine. Measure the battery voltage before starting and confirm 12 volts. Once started the voltage should be at about 13 volts if the alternator is charging and when the horn is pressed and the wipers turned on together with the heated window, the voltage should climb to about 13 and a half volts. If the voltage remains unchanged or drops the alternator is damaged. Usually the head lights would be turned on to carry out this simple test but as the fuses blow you can do that when you've found the short circuit. Good luck and best regards John

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1 Answer

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Check all fuses and verify no melted/damaged wires. You may have damaged something on the charging circuit by reversing the current. The battery light comes on when the alternator is not charging so I would double check the alternator at a different location as it sometimes will show good at one place and bad at another...Also have the battery checked to make sure there was no damage to it in the process and pray that the main fuse blew before any severe damage was caused.

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Replaced battery in2006 hundayi accent, reversed terminal connection for a few seconds. no radio,instrument panel lights are all on. battery discharging car dies after jumpstart within quarter mile

It is possible that when you reversed the terminals you fried you alternator or melted a wire leading. check all fuses and take the car to a dealer to get the charging/cranking system checked. some parts stores will check them for you for free.

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