Alternator Noise

its been whining this whole time and sure nuff the computer just said a bad alternator will make your vehicle whine. A roaring noise during belt rotation (without the A/C on) will often be caused by an idler pulley bearing going bad. Most often, this noise means a slipping belt. To check an alternator, pop your vehicle's hood and hook up a voltmeter to the car's battery by connecting the red lead to the positive terminal and the black lead to the negative terminal. Failing alternator bearing noise video NOTE- This was an inexpensive brand reman, unknown vintage, and apart from one incident while driving where the charge light came on for a second combined with a metallic clanging, causing me to pull over and check everything, there were no symptoms as far as charge output, just the engine bay noise. Alternator Noises. Over time, the alternator can begin to fail and start causing trouble with the various electrical systems in the car. Shop with confidence. If the belt is rubbing on the pulley due to misalignment or the bearings are worn out your alternator could indeed make a whining noise. Alternator Whine in Car Audio. Odd noises. All rights reserved. For those of you who are lucky enough never to have been exposed to alternator whine, it sounds like a miniature siren that rises in pitch with the speed of the engine. I replaced the belt and adjusted the new belt's tension several times but it has no effect on the morning squeal!. I took off alternator and removed pully then dripped oil where it would make it into the front bearing, thi silenced it for a few days. Overrunning Alternator Pulleys (OAP) are used on a number of late-model import and domestic vehicles. Alternator problems are easy to identify at their onset since they exhibit a number of visual symptoms. Suppression of Transients in an Automotive Environment The initial stage of solid state electronics into the automobile began with discrete power devices and IC components. I recently had to buy a new radio for my car because the old one broke. For those of you who are lucky enough never to have been exposed to alternator whine, it sounds like a miniature siren that rises in pitch with the speed of the engine. INTRODUCTION. Bad bearings could be causing this in both components. Unfollow alternator noise filter to stop getting updates on your eBay feed. Replaced the spring loaded tensioner and crankshaft damper pulley but the alternator still made the screeching noise?? So the clutch on the alternator must be the wrong type or faulty. Val Sargent. New 2019 Dodge Challenger, from Moss Bros. On the last day of my trip home from JC, I started getting radio noise on all freqs that rendered it unusable. I always thought a diesel would be quiet for electrical noises. Verified all grounds. What brand alternator to buy? 2 years and 4 months ago, I replaced the alternator and regulator in my 1975 E model with a solid state regulator and a Plane Power alternator. Check the generator/alternator wiring harness and the connectors at the regulator. did a search on google and some people are saying it could be the alternator pully???. The RFI from these models sounds like the old cartoon rat-a-tat-tat used for machine gun sounds. 5kW (LPG) / 6kW (NG) PowerPact Air-Cooled Standby Generator; Also Includes: Flexible Fuel Line Connector; Provides quiet operation and provides added safety; The most affordable. I had a buddy look at it and we are sure the noise is from the alternator. An alternator making strange noises is a sign that there is a problem with the device. The Left Side Navigation for Make Model for your vehicle might be under contstruction. You can have anything from wrong belt tensioner to a crappy new alternator, to not enough amps. It's usually caused by a ground connection that is less than ideal. What are the Main Components of an Alternator? The alternator helps maintain the voltage of the car battery. AC voltage creates electrical "noise" that can confuse electronic modules and digital communications. Uncommon in most modern cars, the noise is generally due to deteriorated alternator parts or problems with the car’s electrical wiring. Long story short I put a Bluetooth audio unit in my 996 and I get some electrical alternator noise at all but idle. I will probably take the wire off the alt in the morning and see if it's AC ripple. Remove alternator belt. Yellow wrench lite is on. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Fixed the. Used 2018 GMC Yukon from Greenbrier Automotive Group in Lewisburg, WV, 24901. Used 2010 Honda Odyssey from Flow Honda In Winston-Salem in Winston Salem, NC, 27127. Research the 2014 Chevrolet Impala LS in Duluth, GA at Rick Hendrick Chevrolet Duluth. Disconnecting one speaker at a time. Knowing how to replace a serpentine belt can go a long way to resolving electrical problems in your car. When the engine spins the alternator around, the alternator induces an AC voltage that is converted to DC and used to charge the car's electrical system. If the pulley is not in correct alignment with the belt, or if the bearings are won out, the alternator will make a growling noise. iam using the bose amp with bose speakers. I had the same problem with a 1993 Oldsmobile 88. If the pulley is not in correct alignment with the belt, if it's canted on the shaft or if the bearings and bushing are worn out, the growling or whining noise will let you know there's a problem. So, I paid $250 to have it rebuilt and went about my way. Testing to see if the alternator is BAD or not, on your Ford (or Lincoln or Mercury) 4. i just tried to pin point the location. Interference from electrical components such as windscreen wipers, fan heater and direction indicators can be identified immediately. Re-installed equipment a couple of times. Hi Guys,I have a mercruiser 350 mag/bravo III set up. Check your wiring and make sure the connections are tight, if they are loose this will also cause a whine. The alternator will make sort of a growling noise when the bearings wear out but that should be a constant noise. Found this guide on another forum, and given the slew of recent threads on troubleshooting noise, thought I would post it here. They thought at first it was the Steering Pump but it was actually the Alternator. mercedessource Tech help - If you don't look closely this one can be hard to find! I pulled into a drive through the other night on my way home and heard this loud clinking sound in the engine. Cheers SPD _____. 2 weeks ago the alternator light come on and they said it was a faulty one…. You'll need an M10 spline tool if you're going to do it yourself. 5-kW Home Standby Generator with 200-Amp Whole House Switch - NEW THESE UNITS ARE FREE SHIPPING TO A COMMERCIAL ADDRESS ONLY. Keep the engine running and check the voltmeter again. Both whines will vary in pitch with the engine RPM. What you are hearing is alternator noise in the speakers. A whining/buzzing noise coming from the alternator is another symptom of alternator troubles. 5 out of 5 stars 4. tensioner not replaced though as none in stock,chap wants to test alternator but mechanic who did. I bought a rebuilt alternator through Advanced Auto for $136 (20% off sale) w/ lifetime replacement. Some automotive electrical shops will rebuild the alternator and replace the diode bridge. Had a diode go bad, noise but lived with it - till our 430W started acting up, dropping fix every once in a while etc. A good way to tell if it's the alternator pulley specifically is to listen for whether or not your automobile wails even before you. Noise is coming from aux belt area. Reach down and check the belt tension which should be taught. such as a screeching noise from a loose or worn. I can get the noise to stop by pulling the breaker on my alternator. Run the engine and monitor the amp meter. The alternator in most cars is typically sized to match the demands of the running car. One red going to the back of the alternator and a red and brown going to the side of the alternator in a black connector. Alternator problems are easy to identify at their onset since they exhibit a number of visual symptoms. A whining noise from an alternator can be caused by an electrical issue rather than mechanical (bearing, pulley, drivebelt) Causes could be: Battery Bad connection between battery and alternator Bad connection at engine ground. Once I have the engine fixed I may be able to run the bike without the alternator attached, which would eliminate that as the source of the noise. The special tool costs about $65. You'll need an M10 spline tool if you're going to do it yourself. alternator repair 05 chevy equinox. Wow what a great mechanic, says that he checks all my pulleys and doesnt even put it on right. The bad news is the meter was again showing 12 volts with the engine running and under load. 8 volts to keep the battery 100% charged. i finally popped the hood (not a daily driver) with it running and the noise seems to be originating from behind the clutch fan. I have an increasingly loud clicking in my engine. 8 results for alternator noise filter Save alternator noise filter to get e-mail alerts and updates on your eBay Feed. 3L and it's alternator (DR44) and PS pump made no noise at all, no whine, no buzz in the cab, nothing. The alternator provides your car with a constant source of electricity while the engine is running. Glazed streaks on the belt or belt noise when high-load electrical accessories are turned on with the engine idling can be signs that the belt is slipping. When the alternator initially went out, I was in a very small town that only had one of those "we'll rebuild your current dead alternator" shops. An alternator or dynamo not fitted with a suppressor will produce a whining sound, rising in pitch as the engine speed increases. Problem solved. Among the various common charging system problems you might encounter, one is a noisy alternator. Installing a ground loop isolator. It is a noise that only happens when the alternator is on line. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Alternator whining is an irritant perception of the sound quality due to electromagnetic noise. WIth the engine running I have heard a whine noise proportional to RPM, and with the engine off I have heard everything from a high pitched whine to a buzzing noise. Similar noises can also be caused by bad shaft bearings on the water pump, alternator, belt tensioner pulley or power steering pump pulley. Turns out the ALTERNATOR is squeaking! I spin it by hand and yep,that`s what`s making the noise. What I turn the car on, the alternator or alternator belt squeal. It'll help you to diagnose a BAD alternator in a pinch. Does anyone know if the bearings can be replaced and of so what size are they. How to tell bad alternator noise vs. Odd noises. Couldn't find anything wrong with it so looked elsewhere for the problem. The mechanic seemed to think this was. I had the pleasure of listening to another 900 and some 1200's last weekend (you know out with the mates like you do) and in good nick I don't think there is much to. About 17% of these are earphone & headphone, 2% are deep groove ball bearing. A whining sound in your car's radio is likely to be DC noise from the alternator, especially if the pitch of the noise changes with engine speed. you need to get a new alternator or you are going to get stranded, get that and if you still have the noise change your plug wires as that is usually the sign that your wires are going bad. The noise will disappear when the component is switched off. That reduces belt wear and quiets the engine by reducing noise, vibration, and harshness. I have tried the PAC-1 filter they worked to get rid of noise but cut out to much of the sound quality. Similar noises can also be caused by bad shaft bearings on the water pump, alternator, belt tensioner pulley or power steering pump pulley. Things that stop squealing noise. Research the 2014 Chevrolet Impala LS in Duluth, GA at Rick Hendrick Chevrolet Duluth. Output volts normal. It was so loud I had to shut to engine off to place my order. Got the alternator replaced, noise gone, 430 solid as a rock again. I do not know your exact wiring setup but there are a few basic rules to follow to avoid unwanted noise in your electrical system. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Then the battery died which cost us another $223. A performance alternator really doesn't require much in the way of modifications. What are your thoughts?. A leaky diode also can allow current to drain out of the battery through the alternator when the vehicle is not being driven. Without an alternator that performs properly, your electrical system can jeopardize your accessories' functionality, as well as your vehicle itself. then suddenly make a rrrrrrr-ing! kind of noise, and the engine will stop rotating. Alternator Noise Filters suppress noise on CB, 2way, and other mobile radios, as well as other mobile electronics prone to alternator noise. I read everything on the web I could find. The bad news is the meter was again showing 12 volts with the engine running and under load. I have a 2000 Chevy blazer 4wd I have replaced the alternator air conditioner compressor water pump serpentine belt idler and tension pulley and I still have that noise when I start my vehicle in the morning its consistent when I drive off the noise is again consistant'after the car is warmed up and its idling the noise stops but one I. If the symptoms were not appearing intermittently before the continuous onset, and a check of the physical wiring doesn't reveal a problem, the most likely candidates are the alternator diode array or the regulator, or both. Order Alternator Repair Kit for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Our range of Honda Jazz Engine Management covers all models and years. It is a noise that only happens when the alternator is on line. 2 weeks ago the alternator light come on and they said it was a faulty one…. Problems with the Alternator's Decoupler Pulley. They can hum, but a squeal is caused by a slipping belt. Zhongshan industrial 30KVA 24KW 1500 / 1800rpm Silent Marathon alternator low noise Small Marine Diesel Generator for sale. I did step from 144 to 148 and. a 10in REaudio sub with a USamps amp. Grants Pass Airport. Run car again, the alternator light will be on and make sure you use no electrics. If this is the case, you can install an alternator noise filter on the power line between the battery. New alternator installed has a whining noise. After about 3 - 5 minutes it completely stops. I'm having a chirping noise around the alternator area on my Chevy Silverado 2007 (4. If the noise is not coming from the belts, you will want to determine wheteher the sounds from the brake system are during stopping, or during travel. WIth the engine running I have heard a whine noise proportional to RPM, and with the engine off I have heard everything from a high pitched whine to a buzzing noise. Visit Superior Automotive Group in Fayetteville AR #3C63RRLL8KG624082. The pulley should spin easily with no wobble or runout. The grid heater configuration along with head lights and a fan blower for heat or defrost on early cold mornings takes the demand for these wimpy alternators to their design limits. The most common and the most annoying. What is Alternator Noise? Alternator noise is a high pitched whine caused by the car's electrical system. Once I have the engine fixed I may be able to run the bike without the alternator attached, which would eliminate that as the source of the noise. 1 - 15-Amp Noise Filter, Heavy-duty suppression of alternator & ignition noise, Land mobile class in-line filter, BR-FILTER. ok, so i have this strange whining/whirring noise coming from the engine compartment that i originally attributed to an idler pulley. The bushings on the damper section had begun to wear causing a slight rattle and squeak of the belt due to the excess play in the damper/tensioner assembly. Shut switch off and noise goes away after a few seconds delay. Notice I said 2 years and 4 months. A faulty or failing alternator can cause many problems, from a simple discharging of the battery to an engine drivability problem. uk is a site operated by Honda Motor Europe Limited (“HME”) trading as Honda (UK) (company number 857969), with all finance pages being provided and operated by HME’s subsidiary, Honda Finance Europe Plc (“HFE") trading as Honda Financial Services (company number 3289418), a company authorised and regulated by the Financial Conduct Authority under Financial Services. New alternator installed has a whining noise. My sisters truck Had a bad alternator the truck ran fine when they parked to fix the alternator. An alternator with signs of wearing prevents the car battery from fully charging. It's impossible to say for sure without looking at your specific car audio setup, but your audio system may be suffering from a classic ground loop problem. If the noise goes away after removing the antenna, than this filter will NOT help you. Torque Converter Issues and Alternator Noise Testing Before Testing - IMPORTANT PLEASE DO NOT SKIP! Before doing any testing of the alternator for AC noise, make sure to remove any and all wiring modifications. i just tried to pin point the location. I believe the new pulleys are of better design, and so may have a longer life. An overrunning alternator pulley (OAP) can play an important part in the smooth running of the modern internal combustion (IC) engine. Hello all, My question is, whenever my car sits overnight. The fuel injection system has solenoids that, when they open, create a very high voltage pulse. I don't want to chance to take alternator apart for a very mellow noise, unless it is a no-brainer. Research the 2017 GMC Yukon XL Denali in Bethesda, at Jim Coleman Automotive. The ALTERNATOR keeps your battery charged. I'm thinking its alternator shaft bearings. If the Clutch is engaged, and the vehicle coasts; there is no noise. Other less noticeable and less common symptoms include weird sounds and bad smells. When this happens the serpentine belt will break or derail from the alternator pulley. the battery dies over night then I need to give car a jump. Other belts to consider are the alternator belt if you hear the sound under load or acceleration, or if under idle it may be the timing belt. I replaced the belt, idler, and tensioner when I noticed just spinning the alternator gives the sound I'm hearing. This is considered a NORMAL condition and is caused by the rotor “slow-down” function that is built into the alternator. If the alternator clutch pulley is rattling, replace it. Should I treat this chirping noise as the alternator is going to fail imminently and leave me stranded or is it a noise that can be ignored for some weeks or months? Update July 2017: Car was rear ended at speed and squashed into stationary vehicle in front. M1031 Cold start Advance and ECM For Generator/Alternator If this is your first visit, be sure to check out the FAQ by clicking the link above. Similar noises can also be caused by bad shaft bearings on the water pump, alternator, belt tensioner pulley or power steering pump pulley. Grants Pass Airport. Could this be an alternator going out?. After searching the net it appears the alternator clutch pulley is common to fail and cause mettalic / grinding noises. Sudden alternator whine is a sign of something changing in the alternator and connected wiring. By the way, they gave me a quote for alternator change at $180 for part and $60 for labor. Unfollow alternator noise filter to stop getting updates on your eBay feed. I've worked in a variety of hands-on professions and love to write about topics that can save readers from needless expenses. Changed oil and filter and it seemed to quiet down. If I was a doggie my ears would have pointed upward when I heard the noise in your video. I have recently been experiencing a noise on transmit that is a 2 tone warble. How serious is this and I`m guessing alternator replacement is inevitable? Any reprocussions if I put off replacing it?. Here's a test you can do: Use a length of vacuum hose to listen for alternator noises. This Site Might Help You. Generally, the alternator's output voltage ranges from 12 volts to 14. Any grinding noise (like a bad water pump) means the alternator is on the way out. I have recently been experiencing a noise on transmit that is a 2 tone warble. A short chirp noise during engine start-up or shut down is most likely caused by a worn overrunning alternator pulley. Seems closer to rear. The mechanical and aerodynamic noise normally depends on speed while the electromagnetic noise variation is load dependent. Usually an alternator with bearings failure makes a loud grinding noise. The alternator may be old and the noise may be due to worn bearings but if it's working, it's working. A good way to tell if it's the alternator pulley specifically is to listen for whether or not your automobile wails even before you. The J&M filter removed all the alternator noise that I used to get on my Sirius radio from the LH pocket DC outlet and was a very easy install. A mechanic said it was either the power steering pump or alternator. see how much current it is producing. A "squeal" by a slipping belt can be the result of a lose belt or excessive charging demands by. How to Put on an Alternator Belt. Alternator whine is caused by a difference in electrical potential (voltage) between two points. Where to next?. Last week I changed the alternator due to the noise. Alternator Belt Problems. hi peeps, bought my dci clio a week ago,chap i bought it off said he would sort the whirring noise and so far it aint happening,thought i would get your opinions on the problem. The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U. Recognizing that the noise didn't change when you turned the wheel was a good clue and you picked it out. View pictures, specs, and pricing on our huge selection of vehicles. but the ratling that its making is somwhat like a plastic sound even tho there is no plastic around that areaand its coming from the left side of the engine. I also had interference into the EEC (electronic engine control). Check out the entire library of sounds recorded and uploaded on Mycarmakesnoise's database. I took the serpentine belt off and spun all the accessory wheels. Easy to use parts catalog. Hyundai i10 screeching noise - advice? Extremely common on Hyundai/Kia cars, the alternator belt may seem tight enough, but they need to be super tight. Ltd which found in 1989. The alternator in your car's engine charges voltage to help electrically power your car. Is only the alternator responsible for unwanted engine noise? No, the alternator isn’t the only engine part that makes a racket underneath. The alternator shaft bearing alerts of mechanical failure by making a howling or grinding noise, but other symptoms may appear, including: Battery warning light illumination Engine will not start Engine. its been whining this whole time and sure nuff the computer just said a bad alternator will make your vehicle whine. Alternator noise - Nissan Nissan Alternator makes noise. Eliminating the noise is accomplished by either using an electrical filter in the power line to the radio or by replacing the alternator. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. In some cars, it could be caused by a noisy alternator bearing. I Just installed the antenna noise filter and it seems that the alternator noise is gone, I listened real closely and I did'nt hear the familiar whinning of the althernator noise going up and down with the engine RPM so that is good. If the alternator fails, the dashboard battery warning light will turn on while you drive. My PS pump is very quiet, as quiet as the new 2011 Silverrado that the dealer had on the lot (I went out and started it just to listen for alternator and PS noise, nothing just quiet) and I listened to another 2008 Sierra with the 5. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. These tend to deteriorate over time and are good to replace when replacing the alternator. It's a fast test and more importantly an effective test to find out if the alternator is in fact bad. When your car is running the alternator helps to power the different electrical systems in your car and keep your battery charged. The biggest offender of noise in the car audio environment is alternator whine. The serpentine belt could have stretched with age and may not be spinning the alternator pulley effectively, leading to a lack of charge. With the belt removed, spin the alternator. I had the same problem with a 1993 Oldsmobile 88. The special tool costs about $65. Curing Radio Noise. with news, information and resources. An easy way to tell exactly what it is making the noise is to take a long pry-bar or a long screwdriver, touch it to the alternator (or whatever you suspect is the problem making the whining noise) and then put your ear up to the handle of the tool and touch it to your ear. The alternator tests bad under heavy load (with AC and lights and rear defrost, voltage drops below 13V and keeps dropping), but puts out voltage to spec when not loaded like that. Finally, the alternator completes this cycle by charging the battery. If the symptoms were not appearing intermittently before the continuous onset, and a check of the physical wiring doesn't reveal a problem, the most likely candidates are the alternator diode array or the regulator, or both. net Article: Alternator Whine - Can this advice from K0BG save you from annoying noise while mobile? - eHam. The smaller, enclosed fans produce less noise, particularly at higher machine speeds. Alternator Whine To me, alternator whine is the most annoying form of noise. The pully on the alternator might be freezing up on you. Or, it is being picked up in an "upstream" component like a receiver or equalizer and entering the amp through RCA leads: that requires a different type of suppressor. After about 3 - 5 minutes it completely stops. To do a quick check on an alternator, I was told that you could start the car and then remove the negative battery cable. It'll help you to diagnose a BAD alternator in a pinch. Specifically, worn out bearings inside the alternator have been known to cause this type of noise. In this article, I present some of the possible causes of whining noise while accelerating. Noise from bad alternator The video that you posted CKVPatriot was so helpful. Do not let the rain or other liquid drop into the alternator. AC voltage creates electrical "noise" that can confuse electronic modules and digital communications. The alternator "appears" to be working fine; doing it's job. I narrowed it down to the alternator. Got the alternator replaced, noise gone, 430 solid as a rock again. Likely culprits include the ignition, the alternator or even a fuel injector. These were to be found in the alternator rectifier, the electronic ignition system and the voltage regulator. A comparable Alpine would have cost about $50 morenot sure why mid range Alpines don't have 3 sets of pre-outs. If you need your item a hurry please select the EXPRESS POST option! We will turn-around your order within 1 BUSINESS day (usually under 24 hours) and then Australia Post takes 2-8 BUSINESS DAYS to deliver standard postage. see if the amount of current is to high. A dead car battery is the first sign that something might be wrong with the alternator. While leaving their parking lot the light came on. Turns out the ALTERNATOR is squeaking! I spin it by hand and yep,that`s what`s making the noise. Does any one know what might be wrong? I would like to solve this. Refer to the Repair. Problem solved. Hyundai i10 screeching noise - advice? Extremely common on Hyundai/Kia cars, the alternator belt may seem tight enough, but they need to be super tight. Failed load test Alternator ripple is electrical "noise" that is produced during the rectification of the. Whether it is sometimes referred to as a fan belt, alternator belt, or water pump belt, it is most properly called an accessory drive belt, V belt, or serpentine belt. Used 2010 Honda Odyssey from Contemporary Motorcar in Erie, PA, 16509. There are several possible causes of alternator whine and troubleshooting is the best way to isolate it. A number of electrical parts in the instrument cluster including the speedometer and tachometer can stop working when the alternator fails altogether. I believe the new pulleys are of better design, and so may have a longer life. It's a question of time before the alternator goes out. If you have belt problems or noise, check the alternator pulley. While driving intermittent shimmy like going over rumble strips. WIth the engine running I have heard a whine noise proportional to RPM, and with the engine off I have heard everything from a high pitched whine to a buzzing noise. I didn't have any trouble until the alternator was replaced. cause i dont know where exactly it is coming from, but its coming somewhre around the alternatorright now i its slightly lighter sound i can bearly hear it next to the engine noise. As it warms up, it’s able to better “grip” the. 8 results for alternator noise filter Save alternator noise filter to get e-mail alerts and updates on your eBay Feed. The whining eases off, comes back, eases off, comes back. Here are some common causes of alternator noise. If the bushings that the alternator is mounted on have gone bad, a noise will be produced. what you need to do is measure the alternator output current. That one whines too! but slightly less. I went from the hot side of the alternator light socket direct to ground and it is 12V. An automotive alternator is responsible for providing the vehicle with electrical power while the engine is running as well as charging the battery. Here are some common causes of alternator noise. I put an aluminum tube down to the alternator while running engine, and other end up to my ear - it definitely is making noise. In this case you will need to filter the noise at the source (like the alternator or fuel pump). 2019 Ram 3500 For Sale in Mountain Home, ID on Commercial Truck Trader. What you should do is get a long screw driver and place it the inner portion of the alternator pulley while its making the noise, put your ear to the handle of the screw driver and you'll be able to isolate the noise to the components you are testing. I had the intermmitent noise from the engine compartment and thought it was the A/C; I left it a while, (unable to identify exactly what was causing it) and it has got worse, it would appear to be coming from the alternator, probably confirmed now that the charge/battery warning light is on. My alternator has now developed a loud whining noise. This alternator on a Toyota, came in with the owner complaining of a whine under the hood. I took my car to AutoZone for the free alternator and battery test. Disconnecting the sub amp. Cause of Grinding Noise. T-SB-0004-11 January 5, 2011 Page 2 of 2 Alternator Inoperative and/or Abnormal Noise Warranty Information OP CODE DESCRIPTION TIME OFP T1 T2 271011 R & R Alternator Assembly 0. Double the capacitance compared to OEM alternator filters, which results in a better performance in the elimination of RFI generated by aircraft alternators. In this article, I present some of the possible causes of whining noise while accelerating. The alternator is a key component in running the electrical systems in your car. A failing alternator will start to make a loud whining noise at idle and the whining noise will increase with engine speed. The closer to the source of the noise -- the alternator -- the more accurate a measurement you’ll get. Does this look like RFI noise? It has a one wire alternator on it. The bushings on the damper section had begun to wear causing a slight rattle and squeak of the belt due to the excess play in the damper/tensioner assembly. The noise is only audiable when the radio is transmitting. its coming from alternator area,no noise at idle just when moving. I really feel for you if you have harness insulation. uk is a site operated by Honda Motor Europe Limited (“HME”) trading as Honda (UK) (company number 857969), with all finance pages being provided and operated by HME’s subsidiary, Honda Finance Europe Plc (“HFE") trading as Honda Financial Services (company number 3289418), a company authorised and regulated by the Financial Conduct Authority under Financial Services. I narrowed it down to the alternator. In-order to diagnose either of these problems simply remove the belt and rotate each of the pulleys by hand. Only thing is when i started it up the alternator had a whine sound almost like a supercharger. But it often gets overlooked by design engineers despite the positive effects it can have on energy efficiency. It's a question of time before the alternator goes out. I have an increasingly loud clicking in my engine. , I tried dripping some water on belt then starting engine. The new whining noise and then a dead battery would have made me go straight to the alternator to begin with. Applications include AM/FM cassette decks, compact disc players, equalizers and amplifiers, cellular phones, CB radios, etc. © 2011 Powermaster Motorsports. Diagnosing alternator problems can be a bit tricky because the electrical system in a car comes from two places, the battery and the alternator.