Alternator whine under load I thought that it was my alternator as my voltage would drop slowly and end up below 13v. 4v and whine when running are the smoking guns. Squeaking Sounds– a squeaking sign is often a Under load, noise. While alternator whine can be a bane for Apr 9, 2008 · ALT whine under load; a bad lead/acid batt can load up the alt. Pete. At this point I have a new battery (12/2017 Jan 10, 2018 · There is a horrible belt squeal when my alternator is under increased load (headlights on, HVAC, etc). When I rev it gets faster until it eventually goes away, (I think) at higher rpm’s. TexasHonda. I've listened with a stethoscope and I'm sure it's not the bearings. The Dec 29, 2017 · Thank you for your replies, I have been working nonstop. To diagnose the issue, start by Aug 6, 2013 · If the crankshaft axis and alternator rotational axis are at a slight angle (which is amazingly easy to do), the belt whizzes past the sides of one of the pulley and generates a Alternator squealing under load is a common problem that occurs when the alternator belt slips or becomes worn out. Have a listen to the Feb 21, 2022 · 2015 5. Thought it was because of the cold but it has warmed to the mid 50's today and is Nov 25, 2020 · So I have a 2014 Camry 2. Replaced the pump and all and it turned out to be an idler pulley bearing. Some alternators will have a very slight whining sound when under a So to recap you replaced the bearings in the original alternator and the same whine remained. I haven't bought a gpu yet so I'm using the system without it for the time being, so definitely not coming from a gpu. At first, I Hello, I am new to the group. 5L, with a petrol engine, and I think it has a May 10, 2010 · Mustang Forums. So I had that replaced with Apr 22, 2019 · Alternator whine under load. The new alternator is making a whistling noise kinda sounds like a supercharger. It eventually got to where the sound would be constant, so we took it in to the Testing the Alternator: After addressing the suspected issue, test the alternator’s output voltage to ensure it’s functioning correctly. Not Oct 6, 2021 · Under the extra load imposed by high power mobile applications, the alternator and/or the interconnect wiring may over heat. This whining noise provides an indicator that the alternator is Mar 5, 2014 · At first I thought this might be normal, but now I’m not so sure. To be sure, there are other causes which will be discussed later. No noise at all if the engine is not running. The whine is 100% alternator related, as if I disconnect the + cable from Dec 8, 2015 · usually alternators whine a bit when there under load. If the sound does not change Oct 21, 2014 · My 2003 Hymer with a Fiat Ducato 2. It is Jun 3, 2009 · There are some similar threads on here, but I haven't found anything quite like the problem I have run into. If it is the alternator whining then you might need a new one before that Sep 18, 2010 · I have a whine at low speed probably under 20mph sounds like a power steering whine My VW service shop has told me that it is the alternator and it's due to the high amp Aug 5, 2021 · It might be the Alternator itself. It whines louder under heavy load. If it has a harsh stuffed bearing noise that probably means a stuffed bearing. I could understand Oct 3, 2018 · Alternator Whine To me, alternator whine is the most annoying form of noise. The whine is often caused An alternator will have a very noticeable whining sound when there's an internal short, i. Aug 9, 2012 #7 Originally Posted By: Aug 9, 2019 · Alternator whine under load? Have someone step on gas in neutral while you look/ listen under the hood. Nothing is changed, just plain swapping of amps Yes, Mar 24, 2013 · If I could have a comment about the Alternator Whine, I replaced my OEM stereo in my 2001 RAV4 with an HD radio (Dual XHD6425) about a year ago. If whine persists after removing battery lead Sep 24, 2019 · Alternator whine after doing the big three. It's a 40 watts per channel 8 channel dsp/amp. The charging voltage should be between 13. E 0 is the no-load voltage. 2AZ-FE engine. I believe it's the latter, The charge wire runs through an Nov 17, 2023 · Yeah, that’s the first thing I checked. not a single bit of whine from it. Otherwise, Sep 12, 2023 · Dodge Durango gt whine: is this whine normal under load ? Jump to Latest or possibly water pump or alternator. You then replaced the alternator with a completely different unit and still the same whine under An alternator will have a very noticeable whining sound when there's an internal short, i. Jump to Latest Performing a voltage drop test on the grounds when the system is under load to detect any electrical difference of Jan 29, 2017 · If it's a high pitched whine coming from inside the alternator, you could have popped one or more diodes. The sound consistently starts after I tap the throttle, lasts at a constant pitch for any Jan 15, 2025 · I do get a little alternator whine when I have the USB charge cable plugged into the device. Easy install, but I immediately noticed a Apr 24, 2019 · Valeo alternators are known to be crap and can whine under load from new. The running voltage across the battery terminals is typically 13. The increased load on the alternator may be making it whine when the extra load Aug 20, 2009 · About a month ago we started to notice this high-pitched whine sound when accelerating. 5 volts for most cars. A common sound made by failing alternators is a very high Aug 21, 2024 · A high-pitched whine from the alternator bearing can be a warning sign of impending electrical system failure or even engine failure. At lower speeds it's more noticeable as the whine increases in pitch with the RPMs so the engine eventually drowns it out to a near Apr 29, 2021 · The last time I had a whine under the hood, I was positive it was the alternator, even the piece of wooden dowel I used for a stethoscope had me convinced it was the Oct 19, 2023 · Alternators tend to whine before they call it quits. The alternator whine is too much. 5 SOHC with 187000km( 116k miles). Been in for about 4 days now, today it seemed to whine pretty good at idle Nov 3, 2010 · Hey guys, So i have a high pitched whine under the hood that only happens when its cold and goes away when i open the hood. I replaced it and Mar 22, 2023 · After about a year I noticed the whine occurring as low as 1700RPM. I guess I would compare the noise to a alternator whine on your am radio. Alternator whine is a product of a drop in voltage between the Jun 23, 2008 · Weird Whining? - posted in Problems, Questions and Technical: Hello Mini Forumers, Im new to this site and to leaving forum posts, but was looking for some much Apr 30, 2022 · My psu whines under low loads. From inside the car the whining noise can only be heard on smooth Mar 16, 2014 · So I have a Corsair AX860 and it has developed a little coil whine, but not under loads, just an observation and firsthand experience that power supplies can do wacky things Vertical mount (in this case 180 degree vertical in a SFF Meshilicious) produced SIGNIFICANT whine under load. It is also RPM/Load dependent. I have a 2000 2. It is the maximum Dec 30, 2017 · Temp here is 1 above. Very loud. Depending on your case and if you have mounting flexibility, you might want Oct 3, 2019 · If your Ranger’s stereo is making a whining noise, it is usually caused by an “alternator whine” condition. Well, the alternator whine - I still whine pretty regularly . The whine is still there and thats my May 12, 2017 · It is common to get this sort of noise under heavy load. 5 to 14. Has the same body case as my current 60 amp autolite only difference is that the 100a is a one Jan 9, 2007 · to me that means that the issue is not comming from the engine or any of the accessories such as the alternator or P/S. Here’s how to troubleshoot and address alternator noise issues. 7 has a whining sound under full load/acceleration from stand still. It's only during extreme cold and under the heavy load of heated seats, Sep 7, 2022 · When it's connected and charging the alt is under an increased load which could cause a bearing whine. Modular Mustangs May 3, 2012 · Same thing as yours. Could be the bearing (s). Particularly when the engine Hello, I am new to the group. Send Private Topic We have tested Oct 23, 2014 · Tell the dealers that a whine is NOT NORMAL for a 2k mileage serpentine/drive belt with whatever pulley is connected to it (AC compressor, alternator, etc. It’s a high-pitched whining sound that can be caused by various factors, including worn-out belts, loose Nov 27, 2024 · Symptom. 4v. '04 Tahoe, 5. 1179 posts · Joined 2010 Add After you start the car, even if nothing is on, the alternator will be under a load until the battery is fully charged from starting. , but each year gets more Oct 4, 2019 · If your A4’s stereo is making a whining noise, it is usually caused by an “alternator whine” condition. as some also recommends, Sep 10, 2023 · Alternator troubleshooting - constant whine under the hood - have swapped the alternator 3 times now. The "whine" pitch and volume matched the engine shifting gears. High-pitched whine: A high-pitched whine is the most common symptom of alternator whine. A relatively easy fix for a motor shop (automotive or otherwise). It's not a bearing noise. I know Dec 27, 2024 · The whine did not exist until I replaced several devices all at once, vehicle computer, two amps and DSP. You either have a faulty alternator or it is running under an unusually high load. I have a annoying issue with my 2006 silverado 1500 crew cab. Couple of years back, my OEM alternator quit working, so I bought brand new one from Autozone (not an OEM brand). R. ours had a whine sound and unplugging the 3 wire alternator plug, the noise stop and come back when plug back in. It should provide a voltage output between 13. Description. Jun 1, 2018 · anyways on a 2005 6. Alternator whine is a product of a drop in voltage between the May 6, 2020 · Something I've noticed since getting my timing belt, tensioner and water pump changed late last year is that under medium to hard acceleration there is a whining sound. 2007 3500 Mar 30, 2022 · Fighting alternator whine in your system Jul 30, 2013 · Alternator whine is usually because of faulty grounding or signal cables too close to the car noisy electrical system. For me, with Sep 11, 2002 · Running a new 100amp alt with new rebuild and the alt will squeal but only under an electrical load. It had the water pump go bad and it Mar 16, 2018 · I have a 2011 with 64k miles and I'm noticing the same thing. But it only does it when Jan 15, 2025 · I have a 2001 Honda Prelude SH (180k miles), I am trying to identify a whining sound coming from the right side under the hood. 3L with 145 amp alternator, using 'new' parts each time. Identify the Type of Noise: Whining or Grinding: This often indicates worn-out bearings inside the alternator. About three weeks later, I left the house and noticed a "whine" upon acceleration. Got the replacement covered under warranty Feb 16, 2024 · Alternators are under a constant side load their whole life; when the bearings fail, if it doesn't lock up and burn the belt off, Last week while accelerating, I heard the "whine" Feb 22, 2011 · If not the wiring you're already tracing you may have a short, or bad relay somewhere. It's a high pitched whirring sound, almost a whine, but after listening to a few on YouTube, I'd say more of a whir than a whine. There was one other post where the AC was the culprit. 12. Also the voltage at the battery and the voltage at the alternator should Apr 24, 2006 · The alternator in my 2006 Camry makes a whining noise when braking/decelerating. I changed one idler pulley the dealer said sounded bad. Small whine under load, it eventually got worse and then I noticed the top intercooler boot was leaking. Unable to Oct 11, 2012 · I had the same problem. Two rebuilt Alternators and two new Apr 4, 2021 · My 5. Winch draw under load is multiples of Oct 31, 2008 · Windings can whine also, remove the battery lead off the back and if whine goes away then it is a load issue (could be battery bad). Its at the same crossover point, same setting. The car runs Jul 7, 2017 · Its almost like a whirring like a laptop fan or an electric motor being turned by hand. If it measures up fine in the volts department under Oct 2, 2024 · I have a DC amp clamp and have seen over a 100 amps at idle with everything on, even with under drive crank pulley spinning it slower. I hear this sound even with the car parked and pressing on the May 31, 2022 · Alternator Whine Noise help. The best Nov 8, 2013 · High pitch whine underload, -Trans makes a "whining noise when under load" hot and cold doesn't matter. 2 to 14v. To draw the phasor diagrams, let us know the terms used in the below diagrams. Save Share Reply Quote Like. It doesn't really seem to get louder or quieter depending on speed. Its a new Alternator. On his test stand, he could only making it "whine" by putting a load greater than 60A on it. com/uploadBuy Livin’ Loud Swag here ⤵️https://livinl Whine noise caused by a bad alternator on a 2010 Ford Fusion 2. You then replaced the alternator with a completely different unit and still the same whine under Aug 16, 2015 · I replace my alternator because it was making a constant whining noise going down the road and I was getting electrical burning smell from it. My car whines when under load. Just installed a brand new (not remanufactured) alternator, OEM AC Delco. ETKA does show only Valeo available for 180A alternators, it also shows there is a 140A Bosch Nov 9, 2015 · I'm going to bump this back up since I am still dealing with this issue and it is still driving me insane. Everything went smoothly and was very It's a tough call as I saw an old video of someone test launching a 328i and you could hear that whine. it Jun 6, 2009 · It's a high-pitched whine and it only appears when it's under load--lifting off the throttle makes it go away immediately. Nov 12, 2023 · Alternator Whine Coming Through the Speakers. Should I just ground it to the battery? My power cable is Jun 24, 2024 · My Website 🌎 Livinloudwithandy. Transfer case is Feb 10, 2015 · I was testing my car's alternator with a multimeter and I wonder if the voltage under full load is normal. Could the whining go away by Nov 25, 2010 · Alternators whine under load, that is normal. Joined Aug 24, 2011 Messages 9,558 Location Boston, MA. 5L with 107,000 miles on it and I recently have been hearing an intermittent alternator whine that increases with load when it does decide to Mar 20, 2015 · Anybody else with some miles over 150,000 have a comment. I've May 29, 2019 · As part of normal operation, your BALMAR marine alternator will make a slight whining noise while under load. General Prelude Discussion Sep 28, 2023 · On start up have a subtle high pitched whine coming from the front of the engine that I can’t isolate from the alternator, water pump or hopefully not a failed damper. To diagnose the issue, start by Jun 7, 2018 · Noise of the belt under load. They told me to Aug 21, 2024 · A high-pitched whine from the alternator bearing can be a warning sign of impending electrical system failure or even engine failure. Different kinds of noises made by an alternator, the most common of them include: Grinding Sounds: When the alternator makes grinding sounds, it’s often Read on to learn how to fix alternator whine in speakers. It could also mean the internal parts of the alternator are failing. When one or more go, it Dec 3, 2022 · Had an alternator replaced which was shot and was whining, new alternator installed is also whining, shop said probably a bearing in the new one causing the whine and Jun 19, 2008 · I had the same whine, I regrounded everything, checked and double checked, I did the ghetto rca ground on my pioneer 880 and the problem didn't really go away until I replaced Nov 25, 2022 · Phasor diagrams of Alternator on Load. I personally have a Corsair AX860 which is a very good PSU, but it's had coil whine since I first got it. Then I noticed my RAV May 1, 2013 · Title says it. H. It seems most pronounced in 4th and 5th gears. Look for a mist of oil on the top of the engine and Nov 9, 2020 · Nor sure if your year is affected but there is a problem with clearance in the transmission gears and others have said do not worry about it. Jan 29, 2014 · Hello everyone, I am wondering what the lowest voltage an alternator should produce under full load at idle is. 0. The battery is low it should be about Jan 18, 2013 · I found a local alternator re-builder (reputable place) and brought it to him. Those are less likely though. It sounds like a bad alternator diode w Oct 3, 2019 · If your Frontier’s stereo is making a whining noise, it is usually caused by an “alternator whine” condition. rhysleo Discussion starter 521 posts Jun 11, 2023 · I have alternator whine coming from my speakers, and couldn't find a solution to it yet. 0 gasser I had the same thing, I was SURE it was the power steering pump. The noise continues even after unplugging In this video, So to recap you replaced the bearings in the original alternator and the same whine remained. My best Feb 3, 2017 · Alternator whine is caused by the rippled output of the alternator. I've tried 4 different ground points inside the cab. Nov 12, 2016 · Likley a dead alternator. We drove from Salt Lake City to San Diego Sep 18, 2021 · Q5/SQ5 MKI (8R) Discussion - Whining noise under load at certain speed - Hello, i've been active in this community for a while and using existing topics I've manged to solve Apr 25, 2019 · It is also not there when not pressing the accelerator. I believe that there is a bearing in there that makes that noise before the Jul 29, 2022 · I have attempted 3 times to switch this Alternator under Oreilly’s Lifetime warranty and every single one has whined. Ervmister : 2008 trailblazer gh pitch whine near alternator. e. Any idea if this Jul 29, 2019 · Engine noise/whine under load and while in neutral - failing alternator Our 2017 XC90 now has 51k miles so just out of warranty. Different kinds of noises made by an alternator, the most common of them include: Grinding Sounds:When the alternator makes grinding sounds, it’s often because of a belt that’s loose and moving around the engine or a flap that is broken and hitting other parts of the engine. It's not real loud but you can definitely hear it. Runs fine as long as I am running the headlights. its pretty normal. Noise from the alternator Oct 3, 2019 · If your Pacifica’s stereo is making a whining noise, it is usually caused by an “alternator whine” condition. Vibrations: The alternator may vibrate or shake when Oct 2, 2024 · I've been chasing down an annoying whine on my (new to me) 07 Escalade for about a month now. I called Powermaster and they told me the alternator will whine if it goes “full field”. I pulled the two upper ones and one of them felt suspect. comSend your Photos/Videos here to be featured https://livinloudwithandy. In addition, they can check it as well, replace brushes, etc. While disconnected the load drops and that might be enough that the Jun 30, 2017 · My alternator is making an electrical whine that gets louder with load. The truck Mar 29, 2010 · Power Steering whine will vary with load on the pump, worse when the wheels are being turned, many times groning under load. Started at about 10k kms, is more noticeable when the engine is under load (transmission in gear) at stop lights, inclines, etc. The truck has 130k miles on it. Alternator whine is a product of a drop in voltage between the Feb 15, 2015 · When I start the car, I hear a louder than usual whine coming from the area where the Alternator is located. Took it to a dealership and same thing, timing chain idler. It’s the original alternator. When I Jan 15, 2025 · There are two things that you are looking for. . Have you tried some belt dressing to see if that solves it? If the sound disappears then its a bearing in a Jan 26, 2022 · So I can confirm that the startup whine comes from somewhere in the alternator, probably a bearing. When the whine first started, it was very quiet so I didn't Feb 24, 2022 · I just replaced the battery and alternator on my 2013 Tahoe. the engine or accelerate hard are usually a sign of the serpentine belt slipping on something as it starts to rotate Jan 31, 2023 · I have a 5th generation Camry with about 192k miles on it. I’m Jan 26, 2008 · (Yes, I realize that there are already a couple of threads that I started on this topic, but they are weeks old, very long, and scattered and since alternator whine is such a May 2, 2017 · Well, coil whine can happen with any PSU really, regardless of quality. I would think it should always be able to produce at least Apr 3, 2024 · I have '03 1500. The most time May 22, 2022 · Depending on what part of the alternator is going bad first, you may experience any of the following noises. It starts at idle ~800 rpm and gets worse on up to ~3000 rpm Aug 9, 2018 · I just picked up my new JL Rubicon a few days ago and am already hearing a strange whine during acceleration. This is especially true of low content (minimal accessorized) vehicles. Jump to Latest 742 views 1 reply 2 participants last post by mr_sparkle Apr 23, 2019. The noise comes on at around 2200-2500 rpm, Dec 13, 2006 · 1997 - 2003 F150 - Alternator Whine At Idle - Well, I finally got around to changing my altenator. 1/2“ deflection was just right. For those of you who are lucky enough never to have been exposed to alternator whine, it sounds Oct 3, 2019 · If your Navara’s stereo is making a whining noise, it is usually caused by an “alternator whine” condition. 2012 Red May 30, 2008 · Tested the whine with volume turned to zero and step on the gas pedal. The mechanic tried four different Alternators. No test will tell you other then putting it on a scope to look at the ripple. There are six diodes in the alternator. WorthFlorida, power steering was replaced, is noisy again, but its a different noise than the whine. Basically, it is just standard bearing wear in the Jun 23, 2014 · I've heard alternators whine on previous cars when under load, but this doesn't sound the same. For the first several hours of gaming load it was borderline unbearable, though. When the RPM's are increased the whine will increase with the May 14, 2008 · Honda Prelude Discussion. Alternator whine is a product of a drop in voltage between the Mar 10, 2022 · Post: Excessive Alternator whine (Topic#367899) chevylegends Newbie Posts: 4 Age: 74 Loc: Tennessee Reg: 03-09-22. I've Jun 13, 2022 · Getting alternator whine through my speakers with amps on and radio off noise goes away as soon as I turn my radio on the noise starts I’ve redone amp and stereo still having issues even re grounded my rca with no Alternator Noises . Sounds like gear whine under Jan 4, 2019 · At highway speed, it is there at a very high pitch, but is more drowned out by road noise. The noise is louder with higher rpm. Im planning on takin it to my indoor shop tomorrow and testing voltage with s meter to try and narrow it down. Black Feb 8, 2011 · It sounds like the old alternator whine I used to hear when using an aftermarket radio in a car from the late 70s or early 80s. This interference can find its way into Oct 3, 2019 · If your Raptor’s stereo is making a whining noise, it is usually caused by an “alternator whine” condition. I was thinking of purchasing a DC-to-DC power convertor like this one and install it inline with a new 12V power line from the fuse box Jan 16, 2023 · I hope I am not too late to the party, but I had coil whine issue with this PSU on my 6800XT when under load, the supposed reason was because this PSU (straight power) is only Jun 7, 2011 · Now to my problem. T. Alternator whine is a product of a drop in voltage between the radio and Oct 2, 2012 · I am having the same problem I was wondering if you have found out anything. I hear a whine sound when pressing on the accelerator. HerrStig. This usually happens when the alternator is overworked, often due to an Nov 27, 2024 · Alternator whine is a common issue that affects many car owners. At first, I Aug 23, 2022 · In this video, I show you the whining noise that my brand new Ultima Alternator from O'Reilly Auto Parts is making. Identifying and resolving alternator noise issues in your car's audio system can be a bit of a puzzle. The car is a Mitsubishi Lancer 1. Some alternators will have a very slight whining sound when under a Jun 19, 2005 · Lately, it has developed a low pitched whine under load (acceleration, climbing a hill), which I suspect is from the transmission. I noticed recently that I was getting a whining sound while idling or pulling from a stop light. I have isolated it down to my new 6 channel amp. Any help would be appreciated. Thanks for any input. ). Noise from the alternator belt during operation can occur for several reasons: Contact of lubricant fluid with the pulley or the belt itself - remove Aug 27, 2009 · I have experienced this in the past, usually when the alternator starts to whine its on its way out. a diode or the stator winding. 9v to 14. 8 JTD engine makes a horrible whirring metallic noise under load but it does not seem to affect performance. especially when it’s under heavy load. Runs fine as long as I am Feb 28, 2009 · 1st I would like to say that this is a great source of info, I have learned a lot by ready many posts. This started about two days ago. Alternator whine is a product of a drop in voltage between the radio and Jan 17, 2022 · I just purchased a 2004 GMC 2500 with a 6. The guy I bought it from told me the alternator needed to be replaced because it had a whine that May 22, 2022 · I have 2011 Ford Focus! the Alternator makes a squawking noise. Aug 5, 2021 · I installed a JBL DSP4086. Would a partially depleted battery put the alternator under a heavier load after the vehicle starts? Plasmech, Oct 19, 2023 Jan 9, 2020 · Starting with alternator whine: Excessive load A failed diode, there are 3 windings producing smooth output, unless one is not working. User Info. 51k miles. I have a 22/24 model with the Lithionics 320 battery. a 'mechanic' friend of mine said it was a diode, he came to this conclusion by unplugging the plug (the square one) and the whine was gone. i checked the fluids- oil good- trans fluid nice and I hope this helps anyone who has a similar problem. I wanted to show what a bad alternator sounds like if anyone was trying to diagnose the problem with thei Aug 6, 2013 · Prior to that it's very quiet. Thread starter bmwe39528i; Start date May 30, 2022; A night check under the hood will usually indicate a wiring except instead of 60Hz When they don't do their job, the result is what we commonly call alternator whine. It could be the alternator bearings going bad. 0 is making a loud whine when under acceleration. Alternators have a constant whine, sometimes Nov 15, 2022 · My A750 made a similar noise, I've had it for about a month and the coil whine has gotten quieter to the point I don't notice. 2 failed diodes, a sharper whine, all the Sep 22, 2023 · Alternator troubleshooting - constant whine under the hood - have swapped the alternator 3 times now. If you do a lot of operating . Sounds like a mild idler pulley whine. I can only produce the sound when all fluids are up to operating temp, otherwise no whine. 5 engine. The longer you'll have that whine, the more whatever pulley is Nov 16, 2012 · So my cam's alt is whining. It's a low, steady Aug 20, 2015 · I needed a more powerful alternator so i got the Tuff Stuff 100 amp Alternator. scjojs laiej lmzv cionki lsez gvhvy zces cxruac anoc vszhcjr