Question about 2001 Dodge Grand Caravan

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Even after the car is turned off, the clock on the dashboard stayed on and then the battery drained down over night. this never happened before, but it happened last night. Any suggestions.

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If you hold down the odometer reset button and turn the key to the on position(not start position),and then let go of the odometer button the instrument cluster will then go through a self test all of the gauges will cycle and then all of the lights in the dash will do the same then look at the digital mileage read out and it will flash a TDC(Trouble Code) if there is a system problem,also if your battery is failing or getting weak it will cause other electrical problems even before it fails totally,write down the trouble code and call a dodge dealer or reputable shop and they can tell you what the code means.Hope this helps

Posted on Jun 21, 2010

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2 Answers

What is the most battery draining part when car sits over night


hi Larue.
You're late for work and rush out to your car, only to find that it won't start. The headlights are dim and the engine simply refuses to turn over. You realize that your battery is dead. But how did this happen? There are five main causes of car battery drain or failure.

Human error

You've probably done this at least once in your life - you come home from work, tired and not really thinking, and left the headlights on or didn't completely close the trunk. Overnight the battery drains, and in the morning your car won't start. Many new cars alert you if you've left your lights on, but may not have alerts for other components.

Parasitic drain

Parasitic drain is due to components in your vehicle continuing to run after the key is turned off. Some parasitic drain is normal - your battery delivers enough energy to keep things, like your clock, radio presets, and security alarm operational at all times. However, if there's an electrical problem, parasitic drain can exceed what's normal and deplete the battery.

Bad charging

If your charging system isn't working properly, your car battery can drain even while you're driving. Many cars power their lights, radio, and other systems from the alternator, which can make the battery drain worse if there's a charging problem. Then you'll be stranded at roadside with a stalled car that needs a boost. And even then, bad charging will drain your car's battery. A professional mechanic will be able to diagnose what's causing a charging problem.

Defective alternator diode

A car alternator recharges the battery and powers certain electrical systems. If your alternator has a bad diode, your battery can drain. The bad diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won't start.

Old battery

If your battery is old, it might not hold a full charge. If your car consistently won't start, it's possible that the battery is worn out. You should generally replace your car battery every 4-5 years. If your car isn't starting consistently, and your battery is old, battery replacement should be the first thing you consider.
Having a battery that won't hold a charge is frustrating, and figuring out what's causing the problem can be tricky. Assuming that the cause of the battery drain is not human error, you will need the assistance of a qualified mechanic who can diagnose your car's electrical problemsand determine if it is the battery or something else in the electrical system.
you can read up some more at this link.

What is the most battery draining part when car sits over night Google...

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2 Answers

How do i turn off the clock light on a 1999 Pontiac Grand Am? My clock light wont turn off, and its draining my battery extremely fast.


The LED light would only use a tiny amount of power to stay lit, much less than any small bulb in the car. You might have a poor battery, or you might have a drain on the battery from something else staying on. Any parts store could test your battery for free. That's where I would start, making sure the battery can hold a full charge.
Is the clock light in a radio display? Maybe an amplifier or something connected with the radio is staying on? If the clock is a separate fixture (and I don't even know if they still put such things on cars lately- a separate clock, I mean), then the clock could be unplugged. I don't think there would be a way to turn the light off.

If you have a known good battery and it is still draining fast, there are YouTube videos and explanations on how to hunt down an unintended draw. Mechanics may refer to it as a "parasitic drain"
but it is really an unintended drain. Your car's computers, and security systems, and radio and clock memory will always require a very small amount of battery power when the car is shut off, but that amount is measured in milli-amps, very small fractions of 1 amp of power. usually less than 100 milliamps which is 0.100 amps, or 0.1 amp- see, much less than one single amp. A small bulb like under the dash may be rated at around 2 amps or up to 5 amps for typically larger bulbs. A small bulb might actually drain the battery over several hours. Headlights , you are talking lots of amps, I'm not certain but say around 20 amps. So you see, your clock light would have to have a bad short in the wiring to actually drain a good battery. The light itself would not. This is just me talking off the top of my head, I'm not an expert on electronics or electrical circuits, but I think the information is accurate.

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1 Answer

1999 ,4x4,454,2500suburban.airbaglight stays on,when truck is turned off something is draining the battery ,the clock doesnot work fuel gage doesnot work.


Sorry to say, but none of these are related. Fuel gauge is probably the sending unit in the tank, could be wiring. The air bag could be the module,the bag unit, the sensors, or bad wiring. The radio is probably your most likely choice for battery drain. The three main things I have found to drain batteries are the radio, the starter, and the alternator. These three will kill a new battery in 1 to 2 days, An older battery over night. Shorts in the interior lighting is 4th..

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Something is draining my battery on my 1998 Cadillac DeVille


I suspect parasitic draw. All vehicles draw some power from the batteries when the car is shut off. Certain accessories such as clocks, radios remote door openers and alarms always need power. The normal power used is called parasitic draw.

It is always a very low draw so it doesn't run the battery down. If you install accessories like shortwave radios or plug things like inverters and portable refrigerators into the accessory socket and operate them too long without the engine running you can drain your batteries to the point where the engine won't start. If there is an electrical short in the vehicle or a malfunctioning accessory it could be drawing much more than its normal load causing a drain on the batteries. If you leave your door open and the inside lights stay on all night you could drain the battery down till the car won't start.

Here's also a good resource for your car specifically on narrowing down the cause of the drain.

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2 Answers

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MAYBE THERES AN ALARM SYSTEM DRAINING BATTERY
BEST WAY TO CHECK IS REMOVE BATTERY LEAD ,AND WTH EVERYTHING TURNED OFF SHOULD BE NO SPARK WHEN YOU RECONNECT

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You need a repair shop to diagnose this kind of problem, it requires special tools and special testing done by a trained technician.

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Have you confirmed by going out to the car at night that none of the interior lights or lighted visor lights truck or hood lights are staying on? That is by far the most common cause of a battery drain. Other less common cause is a defective alternator rectifier diode Disconnect the battery overnight as well to confirm you don't have a shorted battery cell, that to will run the battery down, it is called an internal drain. Also make sure the top of the battery is clean of any acid.

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