Question about 1996 Dodge Avenger

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Alternator tests good, battery new. works fine for a little bit then drains the battery. has seperate voltage reg on it but cant find where it is located. could this be the problem or any other thoughts.

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You may have a loose connection on one of your battery cables. causing the clamp to not good contact with the copper wire. this will drain the battery unhook both cables and check to see if the clamp is loose from the wire

Posted on Apr 14, 2009

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Posted on Jan 02, 2017

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Does the ECM control the alternator charging amperage/voltage on a 2004 Suzuki aerio? New alternator only charges @12.5. Won't charge enough to keep ahead of necessary power draw.


Some vehicles are fitted with a smart charging system that is designed to prevent the alternator charging during acceleration to free a few horsepower to help.

My experience of these is very limited but there is an ECU that controls them and the battery, charging or ignition light using information from the engine management system.
The alternator generally has an extra plug with about four or five wires which when disconnected render the alternator a standard machine sensed type.

Japanese vehicles used separate voltage regulators longer than most types. You either need experience or a wiring diagram for good fault diagnosis but mostly it is unnecessary to check the charging current of an alternator which bears little significance unless being tested with a graduated load or adjustable carbon pile.

The current output of a healthy alternator is dependent on the terminal voltage of the battery which in turn is dependent on the electrical load placed upon it. Switching on the lights should lower the voltage and increase the alternator output. If the battery is particularly good the voltage won't fall very much and the current won't increase as much as expected...

Measuring the battery voltage with the engine running at about 2000/2500 rpm is sufficient for most purposes. With nothing switched on and a fully charged battery it should be around 14.5 volts and with everything switched on (lights, HRW, heater fan, etc.) a healthy alternator should continue to maintain a voltage above that of a healthy fully charged battery (13.2 volts).

If the voltage isn't maintained on load the charging system, probably the alternator, is faulty and should be independently tested.

Jan 25, 2017 | Suzuki Cars & Trucks

1 Answer

New starter new altinator new battery smell a electral a little bit the battery light turns on and check system light comes on


Have the alternator output tested for any over / under voltage at any AutoZone type place. I might next look at the voltage regulator. Also, make sure all your alternator, battery and ground terminals are clean and with good contact. Do those simple things first. A smell suggests the possibility of a short somewhere so that testing gets more elaborate.

Jul 08, 2015 | 2006 Chevrolet Cobalt

1 Answer

New Battery low voltage issue


If the alternator light is on there is a problem in the charging system. Have a local Autozone or O'reilly auto parts test it when the light is on, do not have the test run unless the light is on. I think you have a defective alternator but the meeting should confirm this.

Oct 08, 2012 | 2001 Volvo S80

1 Answer

I got cuore automatic 10 months before and the problem i am facing is that the car stops very awkwardly on road while even driving. i have consulted many people but the generator is working fine. but my...


Ok....let's start at the beginnning a little bit......have you voltage tested the alternator whilst the car is running.....it should be between 13.8-14.2 v

May 27, 2011 | Daihatsu Rocky Cars & Trucks

1 Answer

First, I notice the speedometer and tac. are not functioning, Interior lights are dim, ac controls turned of aswellas cruise control shuts off. Not sure if its alternator or voltage reg. or what else it...


Check wire between the alternator and battery for good connection. (larger red wire connected to the alternator that is always "hot")You are correct in assuming that the alternator is not charging. Not sure if the regulator is integral with the alternator on yours but they should be replaced together as often failure of one weakens the other. Before replacing, have the system tested (including battery condition after being fully charged) check for voltage and load test).
A weak battery will cause the alternator to work overtime...if battery is bad, it can cause the new alternator to quickly fail again.

May 21, 2011 | 1997 Nissan Maxima

1 Answer

I have just recently replaced the battery on my MR2 and the car was driving fine and after a week I noticed that the voltage meter was reading almost half way rather than the normal three quarters. I kept...


retest your alternator/charging system. Either alternator or voltage regulator is bad. If you have a volt meter/or access to one - easy test - start car and test voltage at battery - it should be 12.6 - 14.8 volts w/car running anything less you have alt/volt reg problem

Jan 05, 2011 | 1991 Toyota MR2

3 Answers

Changed altenator and it wont charge the battery we changed cables battery tested good just not getting charge back to the battery


You may have a new alternator that was built or rebuilt incorrectly. Take it back & have them test it at the suppliers. Good luck!

Aug 08, 2010 | 1999 Ford Taurus

3 Answers

Battery wont charge changed alternator and battery still wont charge


fit a new reconditioned alternator and not one from a junkyard

Mar 30, 2010 | 1992 Ford F150 SuperCab

1 Answer

Brand new battery exploded


Sounds like the alternator is overcharging. Have voltage output of alternator tested a.s.a.p.

Jan 20, 2010 | 1993 Jeep Cherokee Country

1 Answer

Battery dosn't charge, alternator/voltage adapter test's good.


Did you test the Alternator on or off the truck? It might be a problem with the control system to the Alternator. The regulator need a battery feed to work, It is usually ran through an alternator fuse.

Mar 11, 2009 | 2005 Mazda 6

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