Question about 1991 Ford Explorer

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92 ford explorer battery drains power while sitting I put a test light between pos post and pos cable while truck is turned off test light glow I pull the eec relay fuse and the light goes out can anyone tell me what the problem may be.

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  • Ford Master
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You may have considered this ... arrange a volt/ohm meter like you did the light ... set it up for amps ... there should be some reading ... remove the fuses one at a time, until the meeter reads zero amps. When it gets to zero, you are almost home. Explore that circuit to find your trouble.

Posted on May 05, 2010

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1 Answer

Transit battery drains over night


I guess my first question would be how do you know the battery is ok ?
A battery with a dead cell will go down on its own.
The normal process is to disconnect the battery and let it sit - check the voltage every couple of hours.
If the battery is ok, you will need to disconnect the major sections - circuits on the vehicle and test for drains one at a time until you find the circuit that is using voltage with everything switched off.
Sometimes you can pull major fuses and then put them back one at a time. Putting a test light between the neg cable and the battery post will tell you if a circuit is drawing current. If everything is off the test light should not glow after you first connect it.
The ECM will draw a very small amount of voltage all of the time.

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Battery drains when sits hydundai gl accent 2000


HI. Here is a procedure I use to isolate a battery drain. Remove the negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, this will indicate a large drain is present. That should be corrected,asap. Now start removing and replacing the fuses one by one until the light goes out; The one fuse that causes the light to shut off, will be the circuit with the drain. Remember to close the car doors, when testing. If not, the interior doom light will interfere with the results of the test. ..

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I have an 03 ford escape and manage pretty well under the hood, but i can't figure out why my battery keeps losing its charge and stalling the car. The alternator is about eight months old and still tests...


Yeah, these battery drains are the worst. Try this: Turn everything off in the car. Make sure everything is as off as you can get it. (Get the code for the stereo ready.) Now disconnect the negative battery cable end clamp from the negative battery post. Hook up a 12V test light (a spare tail light bulb will work) between the naked negative battery post and the negative cable end you just disconnected. Does the light glow brightly? If so, you have a short some where that is draining your battery down. (If the light glows faintly, that is okay as a small amount of current is needed to power the clock and some memory functions. ) To find the short, pull fuses one at a time until the light goes out. The problem is on one of the circuits protected by the last fuse pulled. From there, use a wiring diagram and the test light to sort out the circuits and find the short. When you connect the battery cable back up, you may need a code to get an anti-theft stereo to work again.

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1 Answer

How do I find a electircal short. After sitting


You have a draw, not a short. Disconnect the positive battery cable, and put a 12v test light between the cable and pos. batt. post. Light will illuminate indicating power is being requested by a circuit. Start removing fuses one at a time until the light goes out. That will be the draw circuit. Check the items on that circuit for the one that isn't shutting off.

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2 Answers

My battery was just replaced and alt checks out ok but battery is dead in the morning i was told it can be the computer is this right


you need to see if something is draining your battery.remove the ground cable and hook up a test light from the cable you removed ,then put tho othe end on the battery post that you took it off of. if the light light you have a drain.to find the cause ,pull fuse one at a time .when the light goes out ,look in the owners manual to see the components that the fuse protects.unplug all of them and put the fuse back in.start plugging them back in and when you get to the one that is causing the problem the light will come back on.have the battery test first,just because it's new does'nt meen it's good,it may be old stock.hope this helps.

Oct 09, 2009 | 1997 Saturn SL

2 Answers

2005 Dodge Caravan with Dead Battery. Replaced and new battery died. Took it in for service. Alternator checked out ok and Drain was within tolerance. Will still die if I let it sit for more than a...


Disconnect battery from vehicle overnight to check for internal battery drain.......just take one of the cables off.
If the battery is still up and starting the vehicle after being disconnected after a day or two......the drain IS in the vehicle and will have to be checked again.
Do it yourself.
Buy a cheap 12 volt test light.
Place it between the cable you removed before.
One end on the battery post and the other on the cable end.
Now....with the key off......
If the light glows brightly....you have TOO MUCH drain.
We want a dim glowing light.
The dim light is just the memory circuits in the electronics and OK.

With the doors closed....take out one fuse at a time until the light glows dim.......the fuse that dims the light is the problem circuit.
If no fuse dims the light...remove relays one at a time.
Remember....some fuses and relays could be in the engine compartment and under the dash.
If no relay dims the light disconnect ALL alternator wires.
Remember....anything that uses power will make the light glow ....keep those doors closed (we do not want interior light drain affecting the test ) and if you have a under hood light check it first by removing the bulb.
We do not want false readings.

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1 Answer

2001 GMC Yukon power drain


Hi. I have posted a procedure below that will help you isolate the actual drain. follow carefully.

Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

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2 Answers

My ford expedition just all of a sudden starting playing the radio in time when the key is not in the ignition and my air is blowing when key is not in ignition now my battery is dead i'm scared to drive...


Hi.this is being caused by a faulty ignition switch the Accessory or auxiliary circuit is not shutting down, via ignition circuit breaker. this will occur in defective switch from time to time. simply replacing this ignition switch will fix your issue.

When you turn your ignition switch all the way off, it is designed to kill all auxiliary power once this motion is initiated. if the switch mechanism is faulty, the circuit is unable to control the current, in return, allowing the current to stay closed. this is mechanism failure at the most and, the switch should be replaced.

If you wish, i will post a battery drain test below so you can pin point the exact location where the circuit is closed when the switch is in the off position. If the current pull is located on numerous devices, this will confirm my diagnosis.

BATT DRAIN TEST--

Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.


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1 Answer

Unknown drainage on the batteries


Here is the procedure that i use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

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2 Answers

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HI. you may have a battery drain issue that is sapping your battery overnight.

Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

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