alternator not charging battery but alternator is good

Test the alternator. Only had battery voltage at the battery, so assumed the alternator was bad. If the battery is fully charged, then yes it will, but not for long. Background: It tested good. The voltmeter should read around 12.6 volts with the engine off and 14-15 volts when the engine is running. If voltage is below 13.5, there’s a good chance the alternator is not keeping up with your battery’s charging … alternator not charging my battery new battery, new alternator (2 actually), checked wiring,checked fuses, checked volts only 12v going through the whole system. The alternator is good and the battery is brand new. All circuits and fuses are good. Checked the alternator and it wasn’t charging battery. You can use a volt meter to test what the battery is receiving by connecting it to the middle of the posts while the engine is running. These newer cars all have a central... #2 – Broken Belt or Pulley. battery good, where is the regulator in jeep cherokke 96? Make sure the 3 wire plug is not corroded If things check out at Autozone with the Alternator it is either battery terminals cables or the wire from the B terminal of the alternator or the 3 wire plug poor main ground. Change - Answered by a verified Ford Mechanic 1.With engine at normal operating temperature, remove alternator harness connector. when tested on a bench. Car battery slowly died on the way home yesterday. Your alternator will not deliver a charge to the battery. (Photo Source: Pixabay) 2. Causes of Alternator Not Charging the Battery #1 – Computer Error. new battery and alternator but alternator not charging battery? Overcharge Battery See Fig. This can also be related to as the problem like alternator not charging the battery but the alternator is good. ALTERNATOR OUTPUT TEST. I took it to 5 places including Lincoln and they said battery and alternator was fine. So I replaced it. Alternator also only puts out 12.8 volts at the post. This is the same connector that lets the on-board computer know if the alternator is charging or not, which is what the battery light actually means. I put a new battery in and noticed that the volt meter was showing that the battery was not charging. The Alternator needs that little bit of current flow created by the Bulb in order to stat charging. We removed the alternator and took it to AutoZone. It's obviously dead. When I tried to start the car it just makes a clicking sound when the key is turned to the on position no lights or nothing. My truck is currently not charging (voltage meter on the dash reads zero, batteries draining on me). I though it was weird that the alternator, battery, and transmission all went out at the same time. 2. Posted by lili_wall on May 10, 2010 Want Answer 0 Alternator voltage regulator failure symptoms. there is not a lot to alternators , as long as they have a 12v feed to get them to work and the output is connected to a battery that's all that's needed. Let’s take a look at these symptoms-Your battery will always seem undercharged. If you're not very well DIY inclined you could just buy the rebuilt alternator and do the R&R, that's pretty simple (just be sure to disconnect the battery first!). For example the battery reads 12v and alternator … With the battery fully charged it seems to drive and shift fine. 1 . Q. Car will run with the battery unplugged. Battery is good took growing off battery truck died. Light still on and car is jerking like it has hiccups. id like to see what your voltages were. Alternator (and v/r, I suppose) checks out o.k. A good auto electrician should be able to trace the cause. I put a new alternator on and the same thing it won’t charge battery. Fixing your battery or alternator can be an expensive repair. I have a 2003 S10 with a Vortec V6. The tech at the Orange Zone(not sure if I can state the name) wasn't able to test the alternator in the car so I removed it and it tested good inside the store. Also the voltage at the battery and the voltage at the alternator should be within 0.5v of each other. One source has that the Battery Charging Lignt Bulb needs to be 3 watts. Alternator not charging. Find out how to test an alternator. I replaced it with a rebuilt alternator producing maximum 13.4 volts and it fixed the charging problem. This is the circuit that goes to the Battery Charging Light. Although the charging system is working, producing 13.4 volts, Now my battery light stays on and message reads "Check Charging System". Most people are driving cars made within the last 20 years. Once we got the circuit board replaced, we realized that the alternator is not charging the battery. The charging system of the car may not be working as per the requirement of the car’s battery. If the voltage at the battery and alternator don't match. 10. You could confirm before and after replacing your alternator that it is in fact charging, by measuring voltage across battery posts while idling. A higher voltage is excessive and not good for the battery. This may seem strange, but the current needed to recharge the battery would not flow at all if the charging system's output voltage was the same as the battery voltage. A greater difference of potential (voltage) between the battery's voltage and the alternator's output voltage will provide a faster charging … Check the 4 pin connector for secure connection. Start the vehicle; Turn on various electrical accessories; Rev the engine to 1,500 to 2,000 RPM; Measure the current with the multimeter, which should read in the 13.5 to 14.2 volt range. I pulled the alternator and had it tested - all green. Just get a good new battery. Alternator is good but not charging due to missing power supply. However, this is not a good idea because it could damage the electrical system of your vehicle and cause greater problems. I checked the battery and it was good. "Good" Alternator not Charging Battery. I ran a wire straight from the alternator post to the battery, no change in voltage. I have run through the testing checklist in my Chilton manual. I think the best way to test would be to compare output voltage (on the big red wire) and field voltage (blue wire) between a car with a good charging system and a car with a bad charging system. Assuming the battery is not faulty, then there is something draining the power from the battery. Fuse tested and is functional 9. No connectors had fallen loose from the alternators and I have power for ignition and so on so batteries are connected and working. I replaced the battery since the previous one was dead, but after charging the battery tested good. Your original Delphi battery was not that great to start with, and is now 7.5 years old. There are two things that you are looking for. So, you might not run into a situation like – car battery not charging alternator good. Some may recommend running the engine with the negative battery cable disconnected to test the alternator. So the battery light suddenly came on. 8. if the battery is roughly 12.6 with the key off, that is good, but if the charging system voltage is not in the range of 13.5-14.5, then there is a problem. Your engine will create unnecessary noise. We didn't have any issues with it before hand. I removed the alternator and took it to be tested. Check to make sure the wire is not broken. Suggested to me to get spark plugs replaced. I checked the alternator which was bad, producing less than 4 volts. I was driving on the hiway when the battery light came on and the truck quit. May 10, 2009 #1 Electrical is not my forte, and I've exhausted the majority of ideas I've had or can find, so I'm looking for advice. Steps for checking the charge sent from the alternator to the battery. Thread starter blainestang; Start date May 10, 2009; blainestang 3 Mustangs, 0 Spoilers. if the battery is going dead while the key is off, then you have a parasitic drain. I have power coming through the white cable going to the back of the alternator and not the green. if the truck dies due ot a lack of voltage, then start checking fuses. It should be hot at all times. You’ll find signs of overcharging. If the alternator is bad will a jump start work? 7. You could check them by looking at the alternator output with an oscilloscope, but that's not exactly a standard peice of garage test equipment. Good battery new alternator but not charging 2003 ford f150. Battery was tested good, the new alternator was tested and it is also good, i have two multimeters as i work on appliances by trade, but only washers and dryers due to medical issues i asked my friend to have his old alternator tested, im not sure if he did, but i will be going at this problem this morning after i do my deliveries Then I was referred to an electrical place and they said although alternator seemed good it wasnt. ... No less, but a little more is ok. A load test on the battery is another good thing to do, by it requires a battery tester that professionals have and most people don't have. I find it hard to believe that while the vehicle was sitting for 2 weeks that the alternator went out. I grounded the dark green as i have read to do and the alternator never turned on. Get a good-quality voltmeter or multimeter and test your battery’s state of charge. The charging voltage should be between 13.9v to 14.4v. Alternator belt tension is correct and belt is in good condition. Ok so here's the story: My battery has been dying a bunch these past few weeks, so i tested the alternator and it wasn't giving a charge, I assumed the alternator was bad and put a brand new one on. Perform alternator output test. If your battery is nearing the end of its lifetime, then this could be the reason that your alternator is not charging. Charged and checked battery it’s still good. If you really are not a DIY type at all, take it to a good indy and tell them what it's doing, let them run some diagnostics and they'll likely replace the alternator. Either it is not getting a 12v feed (6v-12v will do) or the wiring between the alternator and the battery is bad or it is not … Broken Belt When you are observing the radiator system, there are a series of pulleys and belts which work in tandem in order to quickly convert the mechanical energy into electrical energy to power the alternator. Battery positive to Alternator case reading in volts. If there is a burned out Light Bulb the Alternator will not charge. Test to battery voltage at the main mast. If the alternator is not charging the battery…

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