2004 Dodge Neon SXT Sedan FWD-Maintenance & Repair. This started after I replaced a battery that would no longer hold a charge. Have the battery charged and load tested before going anywhere else with this. Bad Alternator or Battery. As your vehicle gets older, resistance in all circuits increases, If only one or two diodes have failed, the alternator may still produce enough current to meet the vehicle’s electrical needs, but it may not be enough to keep up with higher loads or keep the battery fully charged. nippon denso regs dont usually give up unless there is some thing else wrong elsewhere. Maybe they work, maybe they don't, but it's cheaper to just send out another p.o.s. No battery warning light coming on. Alternator Charging Well But Not Charging When Demand Is High, http://www.autoshop101.com/trainmodu...or/alt101.html, https://www.3geez.com/forum/showthrea...r+brake+option, 2 new alternators still not charging, HELP, If this is your first visit, be sure to There's only one fuse under the hood that is part of the charging circuit -- 80A fuse 41. Last night 15 minutes into a 30 minute drive home, the car started dying on me. how your vehicle charges. I replaced the alternator and belt (with a goodyear gatorback, now a continental apparently). - Better answers use proper spelling and grammar. It is often an … Cars & Trucks, Oct 30, 2017 | Most modern vehicles control the alternators field coil and idle RPM to optimize the alternator's output. From the numbers you have a bad connection. If playback doesn't begin shortly, try restarting your device. Battery checked bad under load after 2.5 hours - replaced. It takes very little voltage and amperage to operate dash gauges. Your answer needs to include more details to help people. To that end, you can measure the actual output of an alternator under a simulated load, which allows you to get an idea of what it is capable of putting out in real-world conditions. But when you apply a load as in the 12.44 idle under load, the voltage drops off. The Hyundai was having some problems with the battery getting low. Fitted new battery and Alternator and belt. Battery problem or alternator or battery cable's ,connections etc.... Do you know how to test automotive electrical circuit's ? After you get it started, if battery was good, check starter draw and charging system operation. While the output rating of an alternator gives you an idea of what it's designed to put out, the only way to see what an alternator is actually capable of is to test it. Re: Charging system malfunction under load. There’s this component called the Electrical Load Detector (ELD) in your under-hood fuse box which sends data to the ECU which (along with other info) tells the alternator how much charging voltage to put out. Lights flicker, and clicking sounds but won't turn. I've had really good luck with the Nappa ones, the one I'm sending you is a Nappa rebuild, it was working fine when I parked the car. There are two things that you are looking for. Cars & Trucks, Jul 28, 2017 | Have the Alternator load tested to confirm there is no problem in the charging system. Volt meter 11.8v when lights on 12.02v when no load. the voltage should remain at 14.5 volts at all engine speeds above idle 13.9 volts at idle indicates that the alternator is charging but not at set voltage. Voltage drop testing starting an charging system circuits . We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. Voltage was down to about 10.8v eventually jump started it … Posted by Also have the battery tested, a battery that is starting to fail can cause this problem as well, a failing battery takes a huge amount of charging system power to keep it up, so that makes the lighting see higher spikes in voltage. This seemed to … The battery, alternator and belt tensioner have all been replaced. 2002 Pontiac Grand Prix, Jan 17, 2011 | The other two wires in that connector are to the PCM - engine computer . Videos you watch may be added to the TV's watch history and influence TV recommendations. Step 1 Park the vehicle and turn off the engine. When I had my '71, I went to the one wire alternator and did not like it. I think its a 13 mm wrench for the mounting bolts, 10 mm for the power adapter, unplug the electrical plug. alternator designed for heavy duty service (police version etc) which New computer, no help three - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. Alternator not charging under load Hey again, I'm slowly taking over the 'urgent' forum. You are correct in checking your voltages but your missing testing your amperage output. 2004 Dodge neon New alternator, but battery not charging. You may NOT copy or distribute the content that appears on this site without written permission from Fixya Ltd. © 2005-2021, Fixya, Ltd. or it's affiliates. check out the. Yes this can be a normal condition caused by load being applied to the headlights and that lowers the voltage, the lites dim, then the load is removed and the lights brighten. Also have 12 volts between the ground cable when disconnected and the battery ground terminal. alternator designed for heavy duty service (police version etc) which Bumping this thread, having a similar problem to that described in original poster's last post. Some places test no load voltage which doesn't give a view of how the alterntor performs in a car (under a load) Checking voltage is not enough, you need to know if you have enough amperage to meet electrical demand. Have a manual for Question about 2001 Chevrolet Silverado 1500. then make sure connections are clean and tight. Volt meter 11.8v when lights on 12.02v when no load. may be able to deal with the demand. Consequently, if the alternator doesn’t maintain rated charging voltage at lower engine speeds, the battery will discharge under heavy accessory loads. anything. Under hard acceleration the alternator would not charge, eventually it wasn't charging at all. Under load, the voltage should not drop lower than 9.5 volts. It's possible that the crank pulley is glazed and slipping Jump to Latest Follow 1 - 8 of 8 Posts. Since most late-model import alternators are internally regulated, a failure of the regulator means the alternator must also be replaced. Could it be a bad ground? it sounds like the brushes are bad or the voltage regulator. Most economy vehicle ECU minimize fuel consumption and thus alternator output at idle providing just what's needed to keep the vehicle running while stopped with minimal charging if any. We also share information about your use of our site with our social media, advertising and analytics partners. Ford Cars & Trucks, Oct 19, 2015 | have the charging system check maybe the alt or u my have a bad ground wire some where or power wire. Otherwise, the only option I can think of offhand would be to obtain an That is a classic sign of a poor connection, AKA voltage drop. system is pretty much operational except at that one point, I'm trying Typical loads that cause this are AC climate control related. Diesel stalls under alternator load. This simply means that you must place a load or strain on the alternator in order to see if it is producing the correct charge. good luck, Complete. 2004 Jeep Grand Cherokee, Feb 26, 2018 | 2001 Chevrolet Silverado 1500, Mar 03, 2017 | There is often a huge fuse connected to the alternator’s big power cable. PNP park neutral safety switch . As soon as engine is started, code returns and dash shuts down. Using a voltmeter to test the battery voltage level ,12.6 is fully charged , 14. Sometimes starts no problems, other times it’s a struggle. May 25, 2009, An expert who has achieved level 3 by getting 1000 points, If the condition is present for short times only it will not affect That will give you more information on how well your alternator is working. (adsbygoogle = window.adsbygoogle || []).push({}); It was particularly noticeable at night when the lights were on. making little difference during normal operation but can also influence Under load, the voltage should not drop lower than 9.5 volts. slightly on a hard pull (everything else depends upon that pulley to be The one wire setup would only charge the battery, under load. properly driven) You can't really duplicate that on a static test. The email address entered is already associated to an account. Cleaning / adding additional ground points properly driven) You can't really duplicate that on a static test. It's also possible that the battery was a bit low when you bought it If your battery warning light is on it usually means the alternator has stopped charging and if left unattended the car will slowly lose electrical power until the engine quits running due to … The charging output of the alternator drops when diodes fail. P. Pub911 ... i doubt it's an alternator problem. My experience above back up your statement. Voltage drop testing ? So as a last test, I turn heater blower at lowest, wiper on, small light on then I drove around for 30min, no problem, reading was 14.5V when motor is running, when stop, the tester reading of the battery is about 12.5V. Under heavy load or when in passing gear, the voltage gauge drops and the headlights dim. Turn on all the loads (blower on high, headlights on, rear defrost on, and so forth). 1997 Cadillac Seville, Sep 06, 2009 | Both readings when engine running. 91 accord ce. slightly on a hard pull (everything else depends upon that pulley to be Otherwise, the only option I can think of offhand would be to obtain an anything. Orielly's said regulator tested bad, do i replace my PCM? Overcharge is confirmed by VOM @ 16.9. 2001 Chevrolet Silverado 1500, Mar 15, 2015 | Alternator not charging - replaced. It decides not to have the alternator put out a battery-charging voltage if it senses that the battery doesn’t need charging. Sometimes starts no problems, other times it’s a struggle. and let the customer pay the labor to try again. Ford Cars & Trucks, Jul 08, 2017 | Sounds like your charging system needs some attention. You can't post conmments that contain an email address. Just stand on a tire, pull the belt, lock the latch, and then remove the alternator. If it does not start, check power flow from key through neutral safety switch and starter relay to starter. It's a long story how i ended up with a good running rebuild, and a brand new one at the same time. You can't post answers that contain an email address. A good battery should have standing voltage of at least 12v and be able to "snap back" from a fifteen second 200 amp load. As an Amazon Associate, this site earns from qualifying purchases. Measure the voltage across the battery and the big bat alternator terminal to alternator case. SOURCE: My 2004 Honda Pilot ran fine then a hour later won't start. I would also like to return to the alternator test. You have a faulty Voltage Regulator or relay in the power Distribution box under the hood. 2004 neon changed battery and alternator still not charging under load 3 Answers. If the voltage does not change when the engine is started, if it does not get above 13 volts, or if it charges above 15 volts then the alternator may be faulty. 2006 Jeep Wrangler, Sep 18, 2012 | Both readings when engine running. - Provide details, support with references or personal experience. the problem is where you bought the alternator, their products are crap, even if they work they will fail soon, after going through a bunch of alternators from there, and three bad starters in a row, all bad out of the box, one, parts fell out as I was removing it from the box, I now use Nappa stuff, haven't had a problem since, make sure you use the top end brand stuff from there, there are two lines, one is the cheaper one, and one is the best quality. The most common reason that your alternator is not charging is because of a damaged alternator. It's also possible that the battery was a bit low when you bought it If the alternator is not charging, check the belt’s tension and pulleys, the connections between the alternator and battery, as well as the battery itself and alternator. Ford F-150 Cars & Trucks, Dec 29, 2010 | Under load, with the engine running, the meter was showing 12 volts and bouncing around somewhat. Checking the circuit’s voltage drop may help you test the connections. to give you some ideas that either in combination, or one alone will be 2001 Chevrolet Silverado 1500, See all 2001 Chevrolet Silverado 1500 Questions. When tested at a chevy dealer or parts store this system load test @ 2000 RPM is fine. The alternator is not hard to remove, once you find the latch that holds the belt. The voltage should remain high with these circuits on. pridley230 If it starts the switch is bad . You cannot rely on "seems" when it comes to the battery. Not had a problem with an alternator for many a year, three cars ago it was the ignition bulb blown, it was part of the circuit to tell the alternator to start charging. I removed the serpentine belt and rotated the alternator by hand, and there was a … Pontiac Cars & Trucks, Mar 02, 2018 | The way to test if your alternator is damaged is by using a multimeter. just change it and see how it does, it's more then likely the problem. The charging voltage should be between 13.9v to 14.4v. Right away, there was a strong electrical smell under the hood. Add, Jan 21, 2018 | Thanks for pointing that out! then make sure connections are clean and tight. If the condition is present for short times only it will not affect I will trouble shoot the issue and repair it and I manage to get the job done for free! The alternator is charging as shown by the 13.93 and 14.00 volts in your second set. Stereo went first, then boost gauge, then the warning lights all came on. If it were blown, the OP would have worse problems than a non-charging alternator. DIM fuse #38 10amp in the rear fuse block .this is for battery sense for voltage regulator . Click "Add" to insert your video. 00 with engine running . At first thought battery so we charged up usig one of those chargers you plug in. With the car off, the battery was 12.5V. If the alternator isn’t putting out enough current to keep up with the electrical loads that are placed upon it, or the charging voltage is low, don’t automatically assume the starter or alternator is bad and needs to be replaced (unless you’re bench testing the unit out of the vehicle). can help with this. Stress test the alternator - Place a load on the alternator by turning on the headlights, the radio and the air conditioning. Answer questions, earn points and help others, Multimeter basics voltage and resistance tests free SD Premium video, Electric Testing Techniques You Need to Know, How to voltage drop test starter motor circuit, - If you need clarification, ask it in the. Step 2: Please assign your manual to a product: By entering the Fixya site you declare that you have read and agreed to its Terms. Open the hood and remove any shields or guards covering the battery and alternator. 1 i have a 100 amp alternator on my W30 charging 4 6v deep cycle (total 440 a hr in the house bank) and the starter battery, and i don't have any problems at idle. Try moving gear selector to neutral . Alternators and batteries do not last forever, and each have their own … of some help to you. Besides that you need to know if your rectifier is good. After you get it started, if battery was good, check starter draw and charging system operation. Code can be cleared with reader. Charging problems can be caused by electrical faults in the alternator or voltage regulator, poor wiring connections at the battery or alternator, or a slipping or broken drive belt. Faulty fuse. Tell us some more! You should carefully tap the alternator with a hammer when the car is running in order to test the levels and determine if the alternator is at fault. I think most of the time they throw a new set of brushes in, clean up the outside, and send them off. on Find electrical distribution diagrams here. I was assuming by this time that alternator is charging but when the load is high, it can't supply enough. may be able to deal with the demand. (It's where the voltage regulator is … 2001 Chevrolet Silverado 1500, Sep 07, 2015 | and needs to have the charge level topped off with an external charger. Have the battery charged and load tested before going anywhere else with this. It was very annoying to have the lights dim, when your're stopped sitting at a light. It's possible that the crank pulley is glazed and slipping I will check later today if possible. Check electrical connects at the battery , power cable to the main fuse box under the hood in the engine bay. Battery not charging under load - posted in Duster Electrical: Hi, Looking for some help/direction regarding the battery for my Duster diesel 2013 not charging properly when under load. 2001 Chevrolet Silverado 1500? I have a 99 P71 which has had a charging issue that hasn't gotten any better. Tip: The max point reward for answering a question is 15. If it seems that I'm jumping around a bit, I am, but since the charging Alternator charges fine without a load but does not charge under any load. (adsbygoogle = window.adsbygoogle || []).push({}); (adsbygoogle = window.adsbygoogle || []).push({}); "Refurbished" alternators are such a ripoff. and needs to have the charge level topped off with an external charger. Hi, Looking for some help/direction regarding the battery for my Duster diesel 2013 not charging properly when under load. Good electrical parts aren't cheap,despite what the discount chains try to say, i think to generalize all their products as crap is naive. As soon as the RPM's picked up, the lights would get brighter.
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