Question about 1995 Jeep Grand Cherokee

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Something is draining my battery.

I have pulled all the fuses one at a time and something was still pulling 12 volts all the time.

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Take the alternator to a parts store and have the diode trio checked. auto zone will do it for free i know. the diode trio is a circuit in the alternator that allows electricity to flow from the alternator to the battery but not from the battery to the alternator (kind of a one way street for electrons) if this circuit is bad it will drain the battery even with everything else disconnected.

Posted on Jan 29, 2009

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Unhook pos. cable connect test light from battery to battery cable, if you have drain light will be dim, disconnect fuses or acces. until u find problem

Posted on Jan 01, 2009

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1 Answer

Hooked up my new battery backwards, blew the main fuse. It has been replaced and now the meter fuse in the inside fuse box blows within seconds and gage cluster and alternator not working


Could have damaged regulator. When the car is running have you checked the voltage at battery terminals. If battery is charging it should be around 14 volts. If around 12 your charging system is fubar.

Meanwhile if you have to charge the car every day then something in the car is draining the battery, Using an ammeter you need to track it down, Hook it up to battery and pull fuse out one at a time till the drain goes down. That isolates the circuit with the problem.

Dec 03, 2015 | Cars & Trucks

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Hi I have Nissan Altima 03 no power changed battery don't drive but over night battery drains out no indication lights check altinater ok I don't know pl help


slow drain somewhere. to locate pull the negative cable and hook a 12 volt light between the post and cable. the light should light but if not charge battery then with the light lit pull fuses one at a time until you locate the one or ones that turn the light off then with voltmeter check the cuircuts.

Mar 03, 2015 | Nissan Cars & Trucks

1 Answer

My transit van on a53 plate, is draining the battery, I have had new alternator, and battery but it is still draining battery,


Battery drains are always fun. Generally it means that something you either hooked up recently to a direct hot wire is draining the battery or there has been a wire that got hot enough to melt another wore on the system and cause a full time connection. Other than taking it to the dealer and letting them put a breakout box on your system to isolate the problem, you could put a volt meter on your battery, if there is truly a drain on the system you will see the volts slowly drop, then open your fuse box and one by one start pulling fuses until you find the one that's pulling on the battery, (you'll know this when the volts on the meter stop dropping). When you find the fuse that's pulling the volts down, you'll then be able to start tracing the circuit for that fuse and everything connected to it. It's a PIA but it's something you'll have to do, unless you want to pay dealer prices.

Nov 19, 2014 | Cars & Trucks

1 Answer

Something is draining the battery after a few hours.


So with the key, lights, and everything else off, there should be no drain on the battery.
Take off one terminal and put a 12 volt test light between cable and battery post.
It is lights up, you have something on all the time.
Most common are interior, trunk, and engine compartment lights.
Cigarette lighters can short.
Alternators can blow a diode and drain.
Fuse block can even short internally.

Trick is to narrow it down.
Pull fuses one at a time, to see if any help.
Then start disconnecting branches.
Alternator for example.
Alarm systems of custom stereo stuff is often wired wrong or a drain.
Anything with a remote, such as an iPod or keyless entry can even do it.

Mar 07, 2011 | Chevrolet Silverado 1500HD Cars & Trucks

2 Answers

My battery has been checked and is fine, but the battery will go dead within approximately 48 hours if the car is not started and run. I checked all of the draw from the battery on each fuse and the #9...


TO CHECK FOR A BATTERY DRAIN. TURN OFF EVERY SWITCH IN THE CAR. CLOSE THE GLOVE COMPARTMENT. MAKE SURE THE LITE IN THERE IS GOING OUT. OPEN THE HOOD CLOSE ALL OF THE DOORS. MAKE SURE ALL OF THE COURTESY LIGHTS ARE GOING OUT. DISCONNECT ANY UNDER HOOD LIGHTS. DISCONNECT NEG. BATTERY CABLE. USE A 12 VOLT TEST LIGHT, FASTEN ONE END TO THE NEGATIVE BATTERY TERMINAL, FASTEN THE OTHER END TO A METAL PART OF THE MOTOR. IF THE LIGHT COMES ON, THERE IS A BATTERY DRAIN. NO LIGHT, NO DRAIN. IF THE LIGHT IS ON, PULL EACH FUSE, BIG & SMALL, ONE AT A TIME, OUT OF THE FUSEBOX THAT IS NEAR THE BATTERY. WHICHEVER FUSE MAKES THE LIGHT GO OUT IS CAUSING THE DRAIN. IF THE LIGHT STAYS ON THROUGHOUT THE FUSE PULLING, DISCONNECT THE ALTERNATOR. IF THERE IS SOMETHING WRONG IN THE ALTERNATOR, IT CAN DRAIN THE BATTERY WHILE SITTING STILL, EVEN THOUGH IT IS CHARGING THE BATTERY WHILE YOU ARE DRIVING. GOOD LUCK

Jan 14, 2011 | 1993 Mercedes-Benz E-Class

1 Answer

The battery draining of power when motor is swiched off


TO CHECK FOR A BATTERY DRAIN. TURN OFF EVERY SWITCH IN THE CAR. CLOSE THE GLOVE COMPARTMENT. MAKE SURE THE LITE IN THERE IS GOING OUT. OPEN THE HOOD CLOSE ALL OF THE DOORS. MAKE SURE ALL OF THE COURTESY LIGHTS ARE GOING OUT. DISCONNECT ANY UNDER HOOD LIGHTS. DISCONNECT NEG. BATTERY CABLE. USE A 12 VOLT TEST LIGHT, FASTEN ONE END TO THE NEGATIVE BATTERY TERMINAL, FASTEN THE OTHER END TO A METAL PART OF THE MOTOR. IF THE LIGHT COMES ON, THERE IS A BATTERY DRAIN. NO LIGHT, NO DRAIN. IF THE LIGHT IS ON, PULL EACH FUSE, BIG & SMALL, ONE AT A TIME, OUT OF THE FUSEBOX THAT IS NEAR THE BATTERY. WHICHEVER FUSE MAKES THE LIGHT GO OUT IS CAUSING THE DRAIN. IF THE LIGHT STAYS ON THROUGHOUT THE FUSE PULLING, DISCONNECT THE ALTERNATOR. IF THERE IS SOMETHING WRONG IN THE ALTERNATOR, IT CAN DRAIN THE BATTERY WHILE SITTING STILL, EVEN THOUGH IT IS CHARGING THE BATTERY WHILE YOU ARE DRIVING. GOOD LUCK

Jan 14, 2011 | 2003 Land Rover Range Rover

1 Answer

Car will not start i can remove battery cable for


It sounds like you have something on all the time, that is draining the battery. Check for things like trunk light, etc.
You can tell if there is something on, because with the engine and everything off, there should be no current flow between the batter post and the cable you took off. So you can put a volt meter between them, and get 0. If you instead get 12 volts, then something is on. You can pull fuses one at a time to try to narrow it down. But it could also be the alternator, if a diode goes bad, and that has no fuse. You can just unplug the alternator and see if the drain goes away. While diodes are only a buck, rebuilding the alternator will run more like $50.

Sep 12, 2009 | 1997 Infiniti.5 J30

1 Answer

Something is draining the battery


You have a draw and a draw pulling more than a couple hundred milliamps.This will drain the battery in an objectionably short amount of time.. All the things you mentioned and more can cause this draw. The best diagnostic step towards isolating your draw is with meter that reads Volts DC or better yet a test light.(I think) ..disconnect B+ positive battery cable. Install meter or lamp in series with disconnected cable and battery post. You do have some smal draws like computer memories,clocks etc which will show a low amount of voltage hence a very dim test light. If you are drawing heavy ,obviously the meter will show a full blown 12 volts and the lamp bulb will be very bright. Remove fuses,unplug relays,dis-connect devices while watching the voltage or lamp.You should begin to isolate offending item once the circuit has been detected, Generally pulling all fuses individually will tell you at least which circuit is pulling the amps.

Aug 22, 2009 | 1999 Dodge Durango

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