Question about 1996 Ford Explorer

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Battery not charging , battery is good and alt is good

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  • yadayada
    yadayada May 11, 2010

    have you checked the alternator fuse

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Have the external voltage regulator checked ( IF THE CAR IS EQUIPPED WITH ONE).

Posted on Jul 13, 2009

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1 Answer

Battery won't hold a charge, battery and alternator both check good. Where is the voltage regulator at on these vans?


Hey Rick ,I don't know what you have so it makes it harder to help you ,I don't dough you checked battery and alt . unless you have a dead short the battery should hold a charge , as far as the alt. most have an internal built in regulator , start the vehicle when its running disconnect the battery if it dies its the alt .

Nov 07, 2014 | Cars & Trucks

1 Answer

Alternator not charging


is it charging at 14.9 ? 14. any thing is at 1000rpms ( no lights or radio etc working) 13.23 to 13.86 volt is good enough to charge battery. what is the charge rate.

Jan 30, 2014 | Acura CL Cars & Trucks

1 Answer

Battery light alternator


The Charge lamp comes on with the Alternator fails to keep battery charge going. (lots of way to fail, and ALT Is 100% good) it's a system. each part of it must be good, end to end.
so...
i put my voltmeter across battery, i start car, i see 13.3 to 15vdc, alt is good.
no? , i see now, 12.2v. ALt is dead, (i didnt say bad) and battery is sightly discharged, 12.6v is charged. (key off, rested voltage)
This 12v tells me the ALT is shut down. only why is the question.

how can any charge system fail,
bad battery tops the list here, they LOVE to fail.
1: belt slips.
2: belt missing
3: bad alt.
4: bad wires to ALT . (corrosion on any wire or lug)
5: fuses blown , any listed below.:
your alt is not an ECU controlled, alt ,its 100% self contained

did you ever remove the ALT and blow the 100 amp fuseable link
the first step of any alt pul, is the pull the NEG, battery lug or BOOM.

im logged in to alldata.com so can you.

and what do i see.
a 5 wire ALT. one is the frame ground, so it must not be rusty or..... it fails. frame to engine block. no rust here.

wire L , yellow.goes to dash LEDs (alt failure idiot lamps) (this works)
wire. S white goes to ALT 5a fuse, is it blown?
wire :B B/G color, goes to the 100 amp link fuse. (blown>?)
wire IG Red-white, goes to a fuse marked 10A gauge.

i think the IG wire is the voltage sense wire.
no sense, no charge. I think the whole I/P dash cluster goes dead when this fuse blows.

The S wire is the boot strap voltage sense, it wakes up the regulator .
if open , the reg stays asleep, as does ALT.
Alternators can not self start, the regulator has boot strap device
that cures that. called self excitation. so this wire is critical.
All wires except the L wire is critical. in this case.

the B wire is the big wire, it charges the battery . 50amps or more..

any of the 5 paths open , kills the ALT dead.
The REG inside the ALT can also shut it down.
eg: battery bad, with huge cell resistances. total.
eg: overvoltge for any reasons. including attempts top run car with no battery, (dont ask)
eg: over current (battery cells 1 to 6 shorted) or 25 KC lamps added.
eg: over temperature shut down.

that is about it.







Dec 31, 2013 | 2003 Toyota Matrix

1 Answer

Car will start but wont restart after running several minutes.


Is your battery any good? A bad battery will not charge or charge properly and be at the root cause of your issue.

Jul 28, 2017 | 1997 Mitsubishi Eclipse

1 Answer

99 elantra alt not charging battery' installed new alt and battery and fuse good and still no charge on battery


check 10 amp ECM fuse. Your alternator voltage is regulated by the ECM. If the fuse is good, consider replacing the ECM.

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Oct 05, 2010 | Hyundai Motor 1999 Elantra

1 Answer

I got 04 ford focus good battery alternator but no charge also i check fuse box next t the battery and the other inside the car everything is good but my alternator still dont charge


1) check 10A fuse in the batt. juction box (eng. comp.) hot at all times.
2) check the large red battery wire to the alt. for good conn.
3) make sure the alt. is grounded properly
4) gray wire sent from the alt. to the PCM
5) blue wire sent from the PCM to the regulator (alt.)
6) small red wire power frorm the 10A fuse
if all checks out and still not charge replace the alt.

Sep 12, 2010 | 2004 Ford Focus

1 Answer

1996 aerostar charging problem.Replaced alt with a rebuilt one but still won't charge properly,gauge is showing a loss or discharge.Tested rebuilt alt and it is good,installed a used alt from wreckers and...


I recently went through a battery/charging episode. Not to sound like the wise-guy, But! try a good battery and see what kind of reading(s) you can get.
Let me know if this is of help to you.

Sep 07, 2010 | 1996 Ford Aerostar Extended

1 Answer

Not charging


First tell me why you don't think it's charging.
Because of the voltage reading you are getting at the battery terminals? The range you want is between 13.6v to 14.2v. The higher the voltage the lower the amps. and true the other way, the lower the voltage the higher the amps. If you get a reading of 13.6v or lower, the alt is nearing or at max output. An alt can only run at maximum for around fifteen minutes and it will start slinging solder from overheating. It's a good indication the battery is either totally dead or junk. Charging above 14.2 the alternater is running wide open and is only putting out high volts which will cause the battery to boil , in turn destroying it. This is a bad alternater. All alternaters have integrated voltage regulater with the exception of ver few of the earlier ones. You cannot test an alternater by removing a battery cable to see if the engine keeps running without taking great risk of damaging the alt, regulator. So tell me why you feel it isn't charging. Remember an alt is not made to charge dead batteries. Their sole function is to maintain the battery charge. Without a battery, the alt won't last 10 seconds.
Hope to hear from you and good luck.

Sep 23, 2009 | 1986 Chrysler LeBaron

1 Answer

Alternator test said good, put on car & not charging ,battery test good amp meter decrease`s


Remove and clean battery cables , replace bolts. Check for power going to the alt. it will not charge unless is has power in the connector wire. When alt is tested get them to tell you how many amps it is putting out, not volts. 12 volts will not charge a battery unless you have the correct amount of amps. I had a napa alt and had this trouble twice. The guy said it was good it had over 12 volts output, but it would not charge battery. I fixed mine with a better quality alt. from another store.

Jul 18, 2009 | 1991 Buick Park Avenue

1 Answer

Short


Tour problem is in the voltage regulator inside the alt.
Replace the alt.

Oct 24, 2008 | 1993 Jeep Grand Cherokee

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