Question about 1993 Jeep Grand Cherokee

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Electrical draining my battery, it's not my alternator, what could it be and how would I know that's what it is?

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Hi there. I had the same problem with my jeep and finally found out that I was turning the ignition key too far and it was actually keeping radio etc running behind the scenes. I think it was draining about 7amps. My auto electrician says that the lights are the same where if you turn the dimmer hard left until it clicks to get maximum brightness this is draining 9amps without you realising - except for a flat battery of course. Hope this helps.

Posted on Sep 10, 2010

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If u had ur stereo recently put in is that but the only way is if u have notice any thing from a light trunk door lock dash flickering etc thats u short a live wire

Posted on Aug 31, 2010


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Posted on Jan 02, 2017

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SOURCE: something drains the battery . I've put in new

to find the draw Switch off all electrical loads such as lights, radio equipment, auxiliary equipment and make sure the vehicle ignition system is turned off. Remove all ground paths from the negative battery terminals. Connect a jumper lead from theground cable to the negative battery terminalYou are now feeding the electrical current requirements of the entire vehicle through the jumper lead. Do not activate any other electrical equipment while the jumper lead is supplying the vehicle current. Wait five minutes to allow all electrical devices to shut down and go to standby mode. While waiting for the vehicle electronics to go to sleep, set up a digital ammeter, such as the Fluke 88to read amps (automatic scale) and make sure the test leads are plugged in to the correct connectors to read amps (COM and A). Connect the COM ammeter lead to the negative battery stud and the positive lead to the connected ground cable After five minutes with the jumper and the ammeter connected in parallel, remove the jumper lead from the three connected cables to the negative battery stud as shown in Figure 3. The vehicles entire current requirements (parasitic load) will now be going through the ammeter. Read the current flow in milliamps. Remember that 1000 milliamps is equal to 1 amp. If the readout has ma after the reading youre measuring milliamps, if the readout has A after the reading youre measuring amps. If at any time during this process the current flow is interrupted (a connector falls off) you must begin again with the jumper connected for five minutes before attempting to remove it leaving the ammeter passing all current and measuring the parasitic load, Under normal conditions, while parked, a vehicle equipped with a standard electronics package should be drawing less than 50 milliamps. If the parasitic load is more than this the vehicles battery storage life will be shortened. If excessive current draw is observed, remove the fuses one at a time until a significant current drop is noted. Do not pull and reinstall the fuses as this may wake up some circuits and cause excessive surge current through the meter. Make note of fuse locations as they are pulled so they can be reinstalled in the proper fuse panel location when testing is complete. When high current draw devices are isolated consider relocating their power feed from a power source that is inactive when the ignition switch is turned to OFF. Sorry So long but hope it helps

Posted on Mar 06, 2010

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Battery drains until dead recharged it tahoe starts and runs gauges are dead alt light is on door locks, windows, keyless entry don't work 2003 tahoe 5.3 please help

Try disconnecting your alternator. Charge the battery but leave the alternator disconnected (remove the electrical plug from the rear of the alternator).

If the battery retains its charge and can start the car (you won't cause any damage by starting the engine with the alternator disconnected) it points towards a defective alternator.

If the rectifier pack - the diodes - in the alternator burn out this can cause a battery to discharge very quickly. Sometimes, quite literally, in a couple of minutes.

If the battery still discharges with the alternator disconnected this points towards a failing battery or a drain somewhere else in the electrical system.

It may be that your door locks and windows don't work for the simple reason there's not enough power to operate them. However, as you say your gauges are dead .. this could possibly point towards a drain in the electrical system, but not necessarily so.

It becomes too easy to replace parts one after the other in the hope that a fault is cured. This is an expensive way of going about things. The best option is to pay a workshop or an auto electrician to diagnose the fault correctly. Diagnose the fault first - an auto electrician will be able to tell you within minutes if it's the battery, the alternator or a drain elsewhere.

Mar 14, 2017 | Chevrolet Tahoe Cars & Trucks

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My 2002 caddy drains battery over night . has a new alternator

Something faulty in the electrical system or maybe possibly and aftermarket product has been added to the electrical system and has been left on

Feb 05, 2017 | Cars & Trucks

1 Answer

What would drain the battery and alternator from its power

The cars electrical stuff, haha jk. If your alternator is working properly, the battery shouldn't have any power draining issues. The alternator basically charges the battery but it doesn't hold power in itself. You can get the alternator and battery tested at any auto parts store.

Jun 13, 2016 | Cars & Trucks

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Alternator replace

Removal & Installation

NOTE There is a trend among manufacturers today to refer to the source of belt-driven electrical power as a -generator-; however, by virtue of the method in which the -generator- produces electrical current the device is actually an -alternator-. The two terms may be used interchangeably.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:

    Negative battery cable Accessory drive belt Alternator upper mounting bolt Engine splash shield Radiator support access panel Rear alternator bracket from the engine Alternator mounting bolts Duct on the back of the alternator Electrical connectors Front alternator-to-A/C bracket Alternator

To install:
  1. Install or connect the following:

    Alternator Front alternator-to-A/C bracket. Torque the bolt to 37 ft. lbs. (50 Nm). Electrical connectors. Torque the battery connection nut to 115 inch lbs. (13 Nm). Duct on the back of the alternator Alternator mounting bolts. Torque the bolts to 37 ft. lbs. (50 Nm). Upper front bolt. Torque the bolt to 35 ft. lbs. (47 Nm). Rear bracket to the engine. Torque the bolt to 37 ft. lbs. (50 Nm). Radiator support access panel Engine splash shield Accessory drive belt Negative battery cable
  2. Refill the cooling system. 4 DeVille
    NOTE There is a trend among manufacturers today to refer to the source of belt-driven electrical power as a -generator-; however, by virtue of the method in which the -generator- produces electrical current the device is actually an -alternator-. The two terms may be used interchangeably.
  3. Before servicing the vehicle, refer to the Precautions Section.
  4. Drain the cooling system.
  5. Remove or disconnect the following:

    Negative battery cable Accessory drive belt Radiator Electrical connectors Alternator mounting bolts Alternator

To install:
  1. Install or connect the following:

    Alternator Alternator mounting bolts. Torque the bolts to 37 ft. lbs. (50 Nm). Electrical connectors. Torque the battery connection nut to 111 inch lbs. (12 Nm). Radiator Accessory drive belt Negative battery cable
  2. Refill the cooling system.

Dec 30, 2010 | 2004 Cadillac Deville

1 Answer

Battery not charging

Could be...How old is the battery? If you live in a hot climate, your battery will drain faster. If you are always re-charging your battery, it will come a time it won't hold a charge anymore. Especially if the battery is old. If you access to a Voltmeter, you can check your alternator. A bad alternator will drain your battery in no time. Another potential problem that is difficult to solve is you have a short somewhere in your electrical system that is consistently drawing juice. If you know some basic electrical terms, you can run to your nearest auto store and they sell some battery testing kits. That will be my first stop if you are DIY.

Apr 01, 2010 | 2001 BMW 325

1 Answer

Something electrical is draining battery on 1987 XJ6;

Have you checked the alternator? The alternator may not be charging the battery. With engine running, check the voltage at the battery (it should be ~14V). If it's less than that, your battery won't charge properly. You can take your alternator to auto store to have it load tested also to be sure. Sometime alternator issues don't show up until it gets hot. Defective alternators have also been known to drain the battery after the car has stopped.

May 10, 2009 | 1987 Jaguar XJ6

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2003 mecury mountaineer

Have the alternator tested, perhaps the battery as well. Otherwise, there may be an electrical drain somewhere and that would have to be looked at by someone who knows about vehicle electrical systems. Try the battery and alternator first....

Jan 24, 2009 | 2003 Mercury Mountaineer

1 Answer

Car battery problem

The alternator test will likely indicate a charging problem from the alternator that is not keeping the battery charged up.
Regardless of the alternator test, it would be best to do an electrical draw test to determine whether there is an excess drain on the battery. This can be done with an ammeter between the positive terminal and the positive battery post. This test is done with key off, all accessories off, no lights on, etc. There will be a small draw on the battery in all newer vehicles, but it should be in the order of up to 50 milliamps. If you are getting more than 200 milliamps of current draw then there is a problem with an electrical system that will drain the battery over a period of days or weeks. Once you know this is true, the electrical systems can be methodically tested.

Jan 19, 2009 | 1995 Chevrolet Lumina

1 Answer

Seems to be electrical problem

What initiated the need for jump starting? Is the alternator charging? Has the battery been checked?

To check the alternator, once the engine has been jumped and is running, remove one of the battery post connections. If the engine dies, the alternator is not charging the battery, and the symptoms you describe are the on-board computer going through low voltage spasms until sufficient electrical power to operate the engine / tranny is drained and the car dies.

If the car continues to run with no battery attached, the alternator is charging - - - and I would recommend removing the battery and having it checked and (if good) recharged to full capacity. I would also recommend having it charged even if the alternator is the problem just to delay the onset of the low voltage problems. The car should operate normally for a few miles before the battery drains too low after a full recharge, enabling you to get it to a shop for alternator service / replacement.

If you attempt replacing the alternator yourself, make sure the battery is disconnected prior to starting the job. Saves blowing up good stuff by accidental short.

Hope this helps and good luck!


Jun 12, 2008 | 2002 Mazda Tribute

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