Question about 1999 Chrysler Town & Country

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Charging system not charging battery & alternator are new

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A New alternator does not necessarily mean it is working. Have you tested it with a meter?
It could be the alternator is not charging it which you would notice by there being a warning light on the dash and also you would notice that the voltage reading on the dial would be lower than normal (around 12v) instead of 14-15v when the engine is running.
Or it could be that you have a light stuck in the 'on' position and you aren't aware of it, or there is something else that shouldn't draw current doing so when the minivan is shut down. That you could only tell by finding a bulb (perhaps glove compartment or underhood light) and/or measuring the battery current draw when the minivan is shut down for at least 30 minutes and no lights are on, using an ammeter inserted between the - post clamp and the - post of the battery. It should read less than 25 mA in that full shut down condition. If not let me know and we can go from there.
The only thing left is the voltage regulator. One problem. Voltage regulation is controlled by the power control module (PCM), which is a non-serviceable unit. As a result, the PCM needs replaced. Have it checked and let me know

Posted on Mar 11, 2011

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2000 chevy 4.3 V6 s10 blazer, alternator not charging the battery


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Alternator & Charging System Checks (Alternator Testing)

www.aa1car.com/library/charging_checks.htm....try this link out might help you... https://www.google.co.uk/webhp?sourceid=chrome-instant&rlz=1C1CHBD_en-GBGB719GB719&ion=1&espv=2&ie=UTF-8#q=alternator%20not%20charging%20the%20battery

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My can wont charge my battery and it wont rev about 2500 rpm in any gear. i have replaced cam sensor and crack sensor and put new timing belt and tensioner on?


My car won't charge my battery ? Check the alternator (charging system) . You put new cam & crank sensor an timing belt on for a charging system problem ? Or after you did this stuff ,now the charging system isn't charging the battery ?

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How do you know it's only putting out about 1/2 ? an 1/2 what ? Amps or volts ? Did you hook up a volt meter to the battery posts ? red to red an black lead to negative post of the battery ? Does it show 13.1 to 14. 1 volts with the engine running , if so it's charging . The only thing that would cause the alternator not to put out full charge amps would be a bad diode inside the alternator or a power or ground issue. You need to check power an grounds doing a voltage drop test . Voltage Drop Testing the Charging System

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Battery not charging indicator. What could be my issue?


Who did the testing & did both the
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On my 1998 v6 explorer, i had my alternator rebuilt twice, have bought a brand new one, which is still on there, replaced the battery with a new one. in-line fuse from alternator to battery is good. system...


Most charging circuits are in two sections, the section that charges the battery and the section that "turns on" the alternator when the engine starts. Your alternator has a built in regulator which is powered by a 15 amp fuse and a 7.5 amp fuse that also handles the gauge on the dash.
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1998 isuzu trooper need wiring diagram for charging system with a3.5 li5ter motor


1998 trooper new alternator and still not charging and alternator bench tested good,
Check main 80 amp fuse in engine compartment and also check fuses in inside fuse box, there two in that one. first is engine fuse 15amp and the 10amp gauge fuse,

Here is the wiring diagram for the charging system as you asked for , also check connections, follow battery wire off the back of alternator make sure connections are good , that wire runs to engine fuse box and that is one fuse that i said to check it is 80amp, hope this is helpful good day9_30_2012_10_15_05_pm.gif

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1 Answer

Alternator


Vehicles: any failing to keep its battery charged.

A vehicle unable to charge its own battery has one of 4 problems:
(a) alternator failure
(b) voltage regulator failure
(c) battery failure
(d) wiring problem between battery and alternator/voltage regulator.

One most modern vehicles (including 2002 Lexus RX300 - 2WD and AWD), the voltage regulator is an integral component of the alternator and is not separately serviceable.

In the US, one can get a free "charging system diagnosis" from the popular auto parts chains: AutoZone, Advance Auto Parts & Pep Boys. You needn't remove any parts from the car to get this diagnostic, since they can attach a diagnostic meter to the charging system in the parking lot. This diagnostic aid will tell you exactly which component has failed - battery, alternator or voltage regulator.

In case the vehicle is immobile, one can DIY (do it yourself) the diagnosis.
(a) inspect the wiring for corrosion/loose connections/loose connectors/etc.
(b) check alternator belt/pulley - if drive belt is properly turning the alternator pulley (no slippage/misrouting/etc.), then the mechanical tests are complete, and you'll need to continue testing the electrical performance of the charging system components.
(c) first component to test: battery
DIY test 1: remove battery from car and put battery on a 120VAC automotive battery charger and charge it fully (or just check it in the car with motor off, since the car's charging system is a type of automotive battery charger).
test parameter: a fully charged lead-acid automotive battery should read 12.45 volts on a VOM/DMM
DIY test 2: disassemble battery out of car after driving it to one of the auto parts chain stores (Advance/AutoZone/Pep Boys) for a free battery test. These testers will test the battery under load, which is not possible with just a DMM.
(d) if wiring is good, and battery tests good under load, then
the failed component is the alternator/voltage regulator - by process of elimination.
(e) DIY test 3: direct alternator/voltage regulator test (car must start and idle successfully to perform this test)
Start the car, and put a VOM/DMM across the terminals of the battery. Since the car is running, you'll be reading the output voltage of the alternator and not the output voltage of the battery. The acceptable ranges for alternator/voltage regulator output are:

ALTERNATOR CHARGING VOLTAGE

Most alternators that are charging properly should produce a voltage of about 13.8 to 14.2 volts at idle with the lights and accessories off. Always refer to the vehicle manufacturer's specifications. Many Asian vehicles, for example, have higher charging voltages of around 15 volts.

When the engine is first started, the charging voltage should rise quickly to about two volts above base battery voltage, then taper off, leveling out at the specified voltage.

The exact charging voltage will vary according to the battery's state of charge, the load on the vehicle's electrical system, and temperature. The lower the temperature the higher the charging voltage, and the higher the temperature the lower the charging voltage. The "normal" charging voltage on a typical application might be 13.9 to 15.1 volts at 77 degrees F. But at 20 degrees F. below zero, the charging voltage might be 14.9 to 15.8 volts. On a hot engine on a hot day, the normal charging voltage might drop to 13.5 to 14.3 volts.

Here are the full specs for installation of the 2002 Lexus RX300 alternator - you may be able to check these specs yourself (with a torque wrench), or pass them along to your mechanic.

Note: the VIN 8th digit should be "F" for the 2002 Lexus RX300 (2WD & AWD)

2002 Lexus RX300 (2WD and AWD) - 3.0L Engine, VIN "F" SFI DOHC

Alternator

Drive belt. Tension the belt to 170-180 lbs. for a new belt or 95-135 lbs. for a used belt.
Adjusting alternator lockbolt. Tighten the bolt to 13 ft.-lbs. (18 Nm).
Alternator pivot bolt. Tighten the bolt to 41 ft.-lbs. (56 Nm).

Glossary of acronyms
--------------------------------
DIY = do it yourself
DMM = Digital Multimeter
DOHC = Dual Overhead Cam
SFI = Sequential Fuel Injection
VOM = Volt Ohmmeter

References
----------------
How to test a Car Alternator - todayifoundout.com

Alternator & Charging System Checks - aa1car.com

Dec 26, 2011 | 2002 Lexus RX 300

1 Answer

Two new alternators on and the car still will not charge and it kills alternator. Need to know what to look for in the wiring harness. Auto Zone tested alternators before installation. Still won't...


Go to web site WWW.HMASERVICE.COM and register your vehicle by VIN #. You'll then have access to shop manuals, wiring diagrams, technical service bulletins, illustrations, etc.
Provided there is no problem with the vehicle's wiring, find out what the charging current is to the battery. I've seen batteries which TEST good, but when under a CHARGE short out internally.
Example: Tested a battery & charging system on a Hyundai Elantra, the battery tested "Healthy" but indicated there was a CHARGING SYSTEM PROBLEM. I checked the battery voltage while the engine was running and found the battery voltage at 14.3 VDC (which was normal). I then used a Digital DC Clamp meter arount the positive (+) battery cable & found the battery was charging at 70 Amps!.. it was supposidly already fully charged (should have only been taking 4 to 6 amps when fully charged).

Best guess without looking/diagnosing the vehicle myself

Maybe this will help.

Jun 30, 2011 | Hyundai Elantra Cars & Trucks

2 Answers

Charging system


When the new alternator was installed did you perform a charging test to ensure it works properly. If it's not the alternator may overcharge the battery causing corrosion to the posts and possible cracking of the battery case. If you don't have the tester at home most auto parts stores can connect theirs and it usually is free.

Good luck to you

Oct 16, 2009 | 1998 Chevrolet Express

1 Answer

Battery Light is On


The alternator is not charging the battery. Could be alternator, voltage regulator (which is usually in the alternator) , dirty/loose connections. First I would inspect all relevant electrical connections, clean & tighten. If no change -- replace alternator.

But be sure to fully charge the battery before you run the new alternator (follow alternator installation instructions).

May 13, 2009 | 2000 Volvo S70

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