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How to perform a battery draw test - 2000 Ford Expedition

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To test battery drain you will need a amp meter that can read milliamps, if you do not have a inductive clamp you will need to remove the ground cable and put your meter inline this will monitor the current , however use caution as to not turn on the ignition or any doors as this high load will likely exceed the capicity of your meter and may damage it. The spec for current drain is 50ma but it is not uncommon to see up to 150-200 Keep in mind there are modules that may take up to 1/2 hour to go to sleep so you will need to monitor this for at least 1/2 hour to get a acurate result. Please rate this info for me THankyou RJ

Posted on May 30, 2010

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Battery will not remain charged. Something continues to run after shut down. Can hear small motor running when ignition turned off. Stops when door is opened. Suspect door lock system. Battery new.

sounds like you have a parasitic draw. motor maybe your radio antenna if its powered. you can test for a draw but without knowing what vehicle we are talking about I cant tell you what is considered excessive. some internet research should help you perform the draw test.

Feb 14, 2017 | Cars & Trucks

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1986 Lincoln battery dies sitting still

Either the battery is no good or the car has a load on the battery from part of the car like vanity lights and so on. Have a battery draw test run, you will need a electrical meter called a DVOM and then just Google this "perform a car battery draw test".

Nov 04, 2016 | Lincoln Cars & Trucks

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If I leave pickup 8 hours, why is it dead and has to be jump started?

Sounds as if there is a parasitic draw on the battery. You need to perform a draw test to see what amperage is being drawn from the battery while the vehicle sits. Anything more than !/4 amp will kill the battery overnight. Check for any lights that may be staying on inside the vehicle as well as outside the vehicle while it is shut off before getting involved in a draw test

Feb 20, 2016 | 2005 Ford F-150

1 Answer

My battery keeps going flat and I have noticed that one of my ECI/ECD fuse is missing could this be a potential cause?

A battery that keeps going dead can be caused by a number of things. The life expectancy of a battery is 5yrs. Anything over this in age can cause a problem. If the charging system is not performing properly, it can lead to battery depletion issues. The most likely cause is a parasitic draw which constantly pulls a small amount of amperage from the battery while the ignition is off. You will need to have a parasitic draw test performed to isolate the source of any draw

Sep 12, 2015 | Cars & Trucks

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Battery draining out checked alternator lights radio etc please advise new battery fitted aswell

You need to do a parasitic draw test with a amp meter hooked up in series with negative battery post an negative battery cable ! Check how much draw there is an then pull fuse's till you see the draw go away . Find a wiring diagram of power flow for that circuit to see what all is powered by that fuse . How To Perform Parasitic Draw Test EricTheCarGuy

Jul 09, 2015 | Cars & Trucks

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I have a jetta gls is a 2.0 year 2000 when u try to start the car it looks Like their is no power it gets drain lower. And lower I took the battery and the altenator to have them check and their goobehat...

Have a 'starter draw test' performed. This should check the Amps draw the starter is pulling and the tech' performing the test will know if Amp draw is excessive. 400 and above Amps would indicate starter is bad.

Possible the negative ground strap is loose or burnt. It suffers from battery acid corrosion.

Oct 26, 2013 | Volkswagen Jetta Cars & Trucks

3 Answers

90 gmc safari van doesnt keep batteries alternator

How To Perform a Parasitic Draw Test

This video will show you how to test and determine which system is causing your vehicle to drain the battery. Good luck.

Jul 06, 2012 | 1990 GMC Safari

1 Answer

What are some of the problems that are happening with the 2005 Chrysler 500 battery that cause the battery to go completely dead.

Not sure if there is any particular common problem, but I would certainly start by having the battery Load tested, as well as a draw test performed. If you have a 12Volt DC test light, I can explain how to perform draw test yourself if you wish. Main thing prior though is make sure that battery is in good shape.

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2001 GMC Yukon Denali XL -intermittent dead battery

The wiper should not move regardless of battery change as the wiper switch should have isolated it.It seems to be the only ,as you say,strange thing and would be inclined to believe that that is the probable cause of your fault.Do like your testing method and hope you track the fault down.Good luck and happy new year.

Dec 29, 2008 | 2001 GMC Denali

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