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Battery dead after setting 4 days, tested battery ok, no lights are on, alt is charging 14.2,

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Small short in wiring. test by taking each fuse out one at a time and look for spark as you put back in (with battery charged and hooked up). circuits drawing current will spark. Narrow down to circuits that shouldn't be on when the key is off but spark at fuse.

Posted on Sep 04, 2010

Testimonial: "pulled all fuses and have no spark"

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Posted on Jan 02, 2017

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2 Answers

Battery light on


Alternator is not charging, if you got a reman it should be under warranty and if a shop put it in they should be able to test for free

Apr 04, 2015 | Cars & Trucks

1 Answer

Battery light stays on. Guage cluster amp meter reads normal charging 13-14 amps. Truck starts normal.


If charging light is on, it means some thing in the charging system is going bad. use a test light!-- battery voltage at battery when truck is off should be at least 12.6 or better, if alternator was charging good. if less than 12.4 and it is charging ok. battery is going bad. when engine is running, at the battery there should be at least 13.8 to 14.2 volts or better.if alternator is ok, all checks are done at the battery posts to determine voltage. Hope this helps you out! if less than 13.8 or lower while running. alt, is bad.

Jul 15, 2014 | 1989 Ford F 250

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My 98 lumina has a constant power draw from somewhere. I just replace the battery and had the alt tested (it was good). I have to jump the dang thing every morning but if I drive it enough during the day...


The alternator may charge fine but could drain the battery through a bad diode,have you checked the alt for a bad diode?Disconnect the battery positive cable.Put a regular 12v test light between the battery positive post and the positive battery cable.If the test light is bright you do have a drain,if dim it is OK.A dim light may mean the drain is internal in the battery.If you do have a bright light remove a fuse ,one at a time from the fuse box until the light goes dim.Once dim you have identified the bad circuit.If removing all fuses do not dim the light,disconnect the alt charging wire at the alt,if that dims the light,then you do have a bad diode.DO NOT create a drain(bright light) when checking for the drain by turning on the key or opening a door/trunk etc.
Also,do an overnight battery check by disconnecting the battery overnight,if things are fine the next morning after the battery was disconnected then it is a drain in the vehicle,if the battery is dead even after being disconnected overnight,,then the battery is bad.

Jun 15, 2017 | Cars & Trucks

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Battery Light came on... battery terminal( neg) has acid buildup... cleaned and replaced with new battery... battery light ok at first... one day later... battery light is back on?


is the alternator charging properly ! at battery car off with no accessories on, should be at least 12.6 volts. with car running, at the battery there should be at least 14.2-14.7 volts if alternator is good. but make sure belt for alt. is ok first. if lower then 14 volts change alternator. good-day !

Aug 27, 2011 | 2003 Ford F150 Regular Cab

3 Answers

The battery light comes on and when I loosen the battery cable, the engine shuts off. Is the alternator dead?


to see if alternator is ok, remove negative cable from battery. if car stays running its ok. if it quits then alt, is bad.at battery car off and all accessories off too, there should be at least 12.6 volts at the battery. when running all accessories off, at battery if alt, is good should read 14.2-14.7 volts. good-day !

Aug 21, 2011 | Chevrolet Venture Cars & Trucks

2 Answers

I have a 1990 ford f150 with a 4.6 6 cyl.. Went


You need to pull fuses to see,but it can still be the alternator,with a bad diode allowing the drain,remove the negative battery cable from the battery,then buy a test light,they are cheap,clip one end to the negative battery cable,and touch the tip of the test light to the battery post,and the test light will light up,cause there is a draw on the system,make sure the doors are shut,and the lights are off.Then unplug the connector on the alternator,if the test light light goes off,the alternator is the problem,if not,remove the dome light fuse,and start pulling fuses one,at a time,and putting them back in,as you go,if you pull a fuse,and the test light light goes out,that is the circuit that is drawing the voltage from the battery,leave it out,and hook cable back up,and see what does not work with the fuse still out,and that will be the problem,please rate if this was at all helpful,thank you.

Jul 11, 2010 | 1990 Ford F150

1 Answer

Have 1987 Volvo wagon, changed out the bulbs in the back brake light, then battery keeps going dead (have new battery and alt.) No problem before putting in new brake bulbs. Alt output was 30amps (should...


sounds like the trunk light switch may have gotten knocked loose .. that would leave the trunk light on all the time and would run the battery down in a few days even if fully charged to start with .. you can take out the trunk light to test that theory .. the alternator will only put out what is needed and thats probably 30 amps with everything on .. to test its maximum capacity you need to hook up an external load and you have to run the engine at a specified RPM ... for a quick test.. if your alternator maintains about 13.2 volts at idle with everything turned on .. then its gererally working ok ..

Feb 19, 2010 | 1991 Volvo 240

1 Answer

Electricai problem battery is dead after 3 days


Load test done on battery? Are you familiar with a 12 volt test light ? I can give you a way to test for draw.

Nov 01, 2009 | 1987 Dodge Aries

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Nissan Wont hold a charge


Hi. this is defiantly a slow or major drain that is occurring within this vehicle. Here is a test that you can preform that will help you find this battery drain so you can illuminate this issue.



--BATTERY DRAINAGE TEST PROCEDURE--


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.


Please rate and god bless:)

Apr 23, 2009 | Nissan Frontier Cars & Trucks

1 Answer

When I turn the ignition on the battery light comes on and the voltage gauge drops between 9 & 14. Then it slowly goes up to around 14. I replaced the battery. Alternator??


take volt meter check voltage on batt.while truck is idling,voltage should be between 13.5-14.5v,turn headlights on it should stay in that range if it goes below,check for bad wire connection at alt.,if conn. are ok,theres a good chance alt. not charging properly!before doing test make sure batt.is full charge!

Apr 19, 2009 | 2001 Chevrolet Silverado 1500

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