Question about 1989 Ford Ranger

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Problem with loosing charge on battery it seems that the alternator is draining it. have replaced both and the same problem. have also checked all other connections on the motor and still no luck. any

'89' ford ranger 2.9 lt V-6 having problems with alternator pulling all of the charge out of the battery. replaced battery and alternator and still having the problem. have checked and tested everything and nothing still have the same problem. any ideas please help. MAW

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  • Ford Master
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Is voltage at battery when engine running and headlights on around 13.5-14volts?
if so its not the alternator
do a current draw test with amp gauge in system with everything off 0.02-0.05amp good any more than an amp will drain battery over night something staying powered up or a short can cause this

Posted on May 31, 2009

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Battery wont hold a charge


There are few possible reasons why battery is not holding charge.May be its weak battery or there is loose connection between battery to alternator.There are few troubleshooting help links,related directly to these types of problem,with there troubleshooting procedure.--------Click the link below and go through its troubleshooting details to resolve the issue:---Car battery loosing its charge overnight? http://schematicsdiagram.blogspot.com/2011/11/car-battery-loosing-its-charge.html
--------How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

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-------------How to Inspect Car battery? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-car-battery.html------------ How to Test Car Battery? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-car-battery.html--------- Car Battery Servicing? http://repairhelpcenter.blogspot.com/2011/12/car-battery-servicing.html--------- How to Replace Car Battery? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-car-battery.html-------- How to Inspect Car battery Terminals? http://repairhelpcenter.blogspot.com/2011/12/how-to-inspect-car-battery-terminals.html---------- How to clean car Battery terminals? http://repairhelpcenter.blogspot.com/2011/12/how-to-clean-car-battery-terminals.html---------- How to Replace Broken Car Battery Cables? http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-broken-car-battery.html
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1 Answer

Battery died....replaced battery, kept loosing charge....replaced alternator....I am get a reading from the alternator and from the battery, but the alternator is not charging the battery.....what do I...


have alternator checked at auto parts store. I bought an alternator at P.B.'s
auto parts after the second one was bad had next two tested yep had four bad alternators right off the self fifth one was good. if alternator is good look for pinched wire or wire grounded on cars frame causing a constant drain on battery
or small light not shutting off like glove box light, light down by foot, light under hood or back up light staying on.

Sep 20, 2011 | 1996 GMC Safari

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My 93 ranger is not holding a charge i replaced the battery the alternator the plug that goes into the alternator but still just drains the battery my ignition where the key goes is loose but i wouldnt...


If the ignition switch is effected by the loose
key cylinder ,it may play a role

You need to check out the switch
and look at a wiring diagram to see
what role the ign sw plays, with grounding
the alternator regulator,if it does

Put an AMP Meter in either battery cable
to check for excessive drain

Apr 22, 2011 | 1993 Ford Ranger SuperCab

1 Answer

My battery light is on, had battery charged, will start but light stays on, what could be the problem? power seems to drain the longer it is running, battery seems to loose voltage.


This fortunately is pretty simple. Have the charging system tested or you can do this with a voltmeter on the battery while the engine is running. If the voltage while running is not at least 13.5 volts, replace the alternator. These are internally regulated so you buy the whole thing.

May 31, 2010 | 2000 Chevrolet S-10

1 Answer

New battery. left lights on & had to charge.


There seems to be a no charge state in this case. i recommend checking the charging system. use the procedure below to isolate this issue.

Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use. (Note: never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.)

To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)

The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)

Next, you will need to check the alternators output with the Amp meter.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))

NOTE_ Ok, if everything checks out Ok with the above inspections, and you charging system is working correctly, this will lead to a battery drain issue. Use thsi procedure below to isolate the drain.

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.

Nov 16, 2009 | 1996 Jeep Grand Cherokee

2 Answers

The battery light is on. I have replaced the


check wire connections for short and or loose check for accessories that may be putting a drain on system if good have battery and alternator tested new doesnt mean its not faulty

Oct 31, 2009 | 1999 GMC Suburban

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Replaced battery and alternator car wont start unless jumpstarted


sounds like a bad battery check with a hydrometer if cells show full charge replace battery

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1 Answer

Jeep won't turn over


Check battery first. If battery is good, charge it and your vehicle should start, The symptons your having are indication of a bad charging circuit. When you start it leave the Negative battery loose enough to pull off after it is running, if it continues to run then it was a bad connection somewhere in the circuit or your regualtor, an internal part of the alternator is bad allowing the current to drain in you battery slowly over time when the engine is running. If battery checks good remove alternator and take to an autoparts store and have them check it. Generally most vehicles have a battery or charge light on the dash that will be lit.

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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!

-WB.

Jun 12, 2008 | 2002 Mazda Tribute

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