The alternator tests as good. There is a black box on the back of the alternator that if we pull up on that it charges up the battery but as soon as we let that go the battery loses power
My husband was having this problem with his car a little while back. The wires around this battery has started to rust out. I would check that and make sure those are all good. It was east to replace, at least that's what my husband said. It was also very reasonable to replace.
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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 http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html -------------
--------How to troubleshoot car battery?
After replacing Alternator, the battery
indicator light Comes ON dash?
http://howtobyme.blogspot.com/2011/11/after-replacing-alternatorthe-battery.html
----------1998 Ford F150 pickup Battery Drains overnight due to Alternator?
Alternator drains car battery?
http://technoanswers.blogspot.in/2012/02/1998-ford-f150-pickup-battery-drains.html----------
2002 Ford Focus sits over night and battery goes dead?
http://technoanswers.blogspot.in/2012/02/2002-ford-focus-sits-over-night-and.html-----------
Charging system problem on Chrysler LHS car?
http://technoanswers.blogspot.in/2012/02/charging-system-problem-on-chrysler-lhs.html
-----------Toyota Corolla: Battery Drains out?
http://howtobyme.blogspot.in/2012/05/toyota-corolla-battery-drains-out.html---------
1999 Ford Taurus: Battery not holding Charge?
http://whoisbyme.blogspot.in/2012/06/1999-ford-taurus-battery-not-holding.html
-------------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
--------------These details and procedure will help.keep updated for more help.Thanks.
SOURCE: Won't charge. Alternator tests good.
check all fuses check power behind the alternator me i would put a wire from alternator to battery check what the charge hope it help fixya our post thanks pierre
SOURCE: 2001 Jeep wrangler not charging. Alternator has
on the field wires ones a posative and one a negative and the single post gets connected to a wire that runs straight to the main fuse box in the engine compartment then is fused to another wire that goes to the battery have that fuse checked it could be your problem as far as the feild wires the positive side only works when you start the vehicle up to engage the field
SOURCE: good batt & new alternator.. but battery keeps losing charge
Make sure all connections at alternator are attached. On some, the regulator is inside the computer and if bad, requires computer change.
SOURCE: New alternator wont hold a charge is there a
If you have a fuse it will be in the power distribution center near the battery main fuses and relays are inside.
Check the charging system with a volt meter right at the battery. Battery standing charge should be no lower than 12v if charging you should read between 13 and 14 volts running, about 13 with all electricals turned on. If not, the alternator isn't working OR the regulator has failed. (some regulators are part of the main computer but you need to check which system you have. AND do check for fuses.
If charging system is working you may have a system draw that is pulling the system down overnight. Check that with an ammeter between either cable (removed from battery) and battery connection...pull fuses one by one till draw disappears then check components in that system. Don't be concerned with "low Draw" items such as radio that always pulls something to keep memory and clock working.
SOURCE: 1994 jeep grand cherokee battery wont hold a
Hi.
The "battery not holding charge" means that the battery charge goes down by itself after the battery has been fully charged either by the alternator driving the car, or using a battery charger. If the battery does not hold charge, then the problem is usually the battery itself.
The battery can only be tested using a battery tester or replacing it with a good one. Reading Volts across battery terminals is not a good test.
Before replacing the battery read volts across the battery terminal to ensure alternator is good. If alternator is good, Volts with engine on must be between 13.5 and 15 (see: ALTERNATOR - Jeep Garage).
If the battery and alternators are indeed good and the battery looses charge in several hours, try disconnecting battery terminal immediately after turning engine off. If battery does not go down with wires disconnected, then there is a parasitic drain, which means a short circuit, somewhere in the car's wiring. Common points for parasitic drains are car stereo and wiring in steering column.
If the battery stays charged, but starter motor is clicking and not cranking, then the problem is usually the starter motor itself.
Regards.
Ginko
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That's too bad that your alternator still works, but the battery won't stay charged. I have to plug mine in during the night to make sure that my car will turn on in the morning. We should probably both find somewhere to get replacement car batteries. http://prochoiceseries.com.au/product-ra...
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