Bad Alternator Symptoms

The inverter board powers your laptop's LCD backlight by drawing direct current from the motherboard and converting it to alternating current, a much higher voltage. by Timothy Charlet on. Symptoms of a bad alternator can vary between different makes and models. Other problems, such as a bad battery or starter, may produce some similar symptoms. Car batteries can (and do) fail on their own. The alternator gets its name from the fact that it generates alternating current (AC). The alternator warning light or other dashboard warning lights come on. Also there is a regulator controlling the charging current from the alternator to the battery when the car is running. Airbag / SRS light on instrument cluster turns on for no apparent reason and no accident. other alternator components fail. If you're. All these are symptoms of an alternator gone bad. Some of these indicators include: Headlights that start pulsating at night, from dim to bright. I have a 95 isuzu trooper type s a/t recently my batter went bad and was since replace. My Alternator going bad? Hi there, Thank you for looking. The first time I replaced it, I did not replace the battery at the same time. Check the ammeter for an indication of excessive current draw. signs of a bad alternator other than having no output greater than battery voltage are a pulsation in the dash gauge lights or headlights, this is from a bad diode in the rectifier so you start to see some AC output than all DC and causes lights to flicker. The max output you're seeing is pretty close to 2/3 of the alternator's capacity, that makes me think that you may have lost one leg (hopefully in. com The symptoms of a bad alternator include strange noises, similar to a grinding or whining noise and an illuminated warning light. If the dashboard gradually dims, the alternator is likely at fault. If your vehicle won't start, it's usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter. It’s best to have your charging and starting systems checked before assuming the alternator is at fault. How to Know If It's Battery or Alternator (Bad Alternator Vs Bad Battery) Having a bad battery or bad alternator can be really vexing especially if you can't tell which one it is. Please someone help us. The following symptoms should give you an idea of what's gone wrong, but if you're still not sure, you can always bring your vehicle to Advance Auto Parts for a charging and starting system test. Guaranteed Unsecured Tax Refund Loans Georgia Ga : Online Payday loans no credit check. I have already changed the icp sensor and the hpop because they had already gone out. 10 Symptoms of a Bad Alternator Belt & How To Replace It Apart from the engine and the wheels, there are many other parts in a vehicle that make it run. The starter is the only part of the truck that uses the rear battery. A broken alternator is all too common in the world of non-starting cars. Signs of a Bad Car Alternator. Browse more videos. Keeping a spare in the glove box is also wise, especially on those long road trips. A Car That Fails To Start. Then, if the altanater is bad this quick test will be the proof you need get the car started take the positive cable off the battery if the car stalls the alt is bad, but from the way you are describing these symptoms it sounds as though you may have some water in your fuel system, if this is the case then just add a bottle or two of dry-gas. In your case, with the various symptoms that you had noted (we also see automatic transmission fault warnings, related to this issue), I would have suggested that you check the battery State Of Health (SOH) and the alternator charge output as a first step. The failing alternator symptom most drivers recognize is dim or flickering lights. Problems with an alternator can drain a car's battery. The replacement went out almost immediately and it took 3 months to convince service to give me a new replacement which as you should know are rebuilds. I also see when my lights are on they dim up and down as the engine rev's itself to stay on. 4 Dead Battery Symptoms. The alternator is responsible for recharging your car's battery. COM National Fleet Truck Repair Services can help repair the problem. so alternator bearings only go bad when someone puts a belt on too tight? my g/f car alternator bearings went bad when a tech from a texaco repair shop put on a new serpentine belt on. Warning Signs Of A Bad Alternator Because of the alternator’s importance, it’s essential to watch for signs that it may be going bad, in order to avoid a potential breakdown. So We charged it and they put a load on it and it showed good. Generally the signs of a bad alternator is that you are losing the charge in the battery rapidly. You wouldn't be the 1st, you'd be the 400k'th who has had a bad battery and Ford tests it and their equipment says it's good when it's bad. Will a bad alternator cause the starter to go out. I would pull it and have it tested at an auto parts store if your not sure. However, to really be sure that it is really your alternator that is the culprit, you should have it tested as soon as possible. Alternators don't always go bad in the exact same way. While it could be the alternator, a weak/bad alternator would cause a battery to be low on charge. I didn't see any of the symptoms that have been mentioned here. Symptoms of a Bad or Failing Starter Common signs include the engine not turning over, starter engaging but not spinning the motor, and grinding noises or smoke when starting the motor. Assuming my alternator is good, what could cause these problems?. I had probably 30 starts on the truck without the battery getting charged. 5 Signs Of A Failing And Faulty Alternator 1: The Warning Light. You may have to register before you can post: click the register link above to proceed. Learning to recognize the symptoms of a bad inverter board can prevent you from spending unnecessary money on repairs. Check the battery and the Alternator. If one of these parts starts to work ineffectively or breaks off, you may hear some unusual sounds. So I just recently bought a 07c rcsb v6. Dim headlights indicate that the alternator can’t keep up with the energy request for the lights. The DIC says "Battery not charging" So I assume the alternator is bad. Most cars are this way cause it's cheap to manufacture. If the alternator fails, all the accessories like headlights, air conditioning and most importantly, the car ignition system will eventually fail. While this particular problem can be symptomatic. When the alternator is going bad, 4. Your symptoms are consistent with a low charged battery. Browse more videos. A warm battery will always start a cold car. other alternator components fail. Will a bad alternator cause the starter to go out. These are classic symptoms of a bad alternator/voltage regulator. What is the most common cause of alternator failure? The component that has the highest failure rate on most alternators is the Bridge Rectifier. Know the warning signs of a failing alternator and what to do if it goes out. Symptoms Of Bad Failing Starter. What is with this car this is the 4th alternator 70,000 miles. A bad alternator can be ignored in the beginning but once these symptoms show up, you need to have it fixed as quickly as possible. Alternators don't always go bad in the exact same way. Whining as in whistling, not whining from a bad bearing. If you are getting AC readings of 25 volts it kind of points towards a bad battery or battery connection and possibly a bad diode. Conclusion: So, these are some basic symptoms of a bad alternator. Many so-called alternator problems turn out to be nothing more than a bad connection at the alternator or a bad wiring harness. Well my battery went bad and replaced it and then two weeks later my alternator went completely dead, it was not providing any charge. My starter fried while driving I changed it and then it fried again. The seal itself is made up of a durable rubber material, but over time, it can become brittle and is susceptible to leaks. The best option you can do with a bad alternator is to replace it with a new or used one. 7 is the acceptable range). Symptoms Of Bad Failing Starter. I have a 95 isuzu trooper type s a/t recently my batter went bad and was since replace. Bad Alternator Sign #5: Electric Failures Since the alternator is the primary source of electrical power in your car, electrical failures are signs that it is going bad. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy). With the electronic systems installed in today's vehicles, they can be damaged with voltage spikes coming from the alternator when disconnecting the battery. Due to some electrical issues my Jeep had this time last year, the battery has been killed 4 or 5 times. If you've ever had an "out-of-box failure" of a. signs of a bad alternator other than having no output greater than battery voltage are a pulsation in the dash gauge lights or headlights, this is from a bad diode in the rectifier so you start to see some AC output than all DC and causes lights to flicker. It's unlikely your alternator is bad too, they're known to be pretty reliable. What are the signs that an alternator is going bad & how much is the repair? (1997 Honda Accord) My Accord recently started making a wiring noise that directly correlates with the RPMs. If the above steps reveal that the battery is working, it's time to take a closer look at the alternator. Other problems, such as a bad battery or starter, may produce some similar symptoms. As soon as you notice the symptoms, take the vehicle for an in-depth inspection before the problem leaves you on the side of the road. 7 volts the whole time. It could be another problem that presents similar symptoms, so look into other possibilities—such as signs your alternator is bad—as well if you want to get to the bottom of the issue. The lifespan of an alternator in newer vehicles is typically anywhere from 6 to 8 years for most people. If you're worried about your car starter going bad, learn about these symptoms of bad car starters. The indicator light. But there are a few symptoms of a bad alternator that you will notice: The headlights start pulsating at night, from dim to bright. Dim lights, buzz in the stereo or a dead battery could all be causes of a. The symptoms you describe do often occur for a bad alternator. And the noise was "ringing through the belt. Odd sounds. they sould just like bad alt bearing. A bad diode will cause 33% of the alternator's current output to be lost, something you can't miss performing a load test. My question here is in general and also still concerning the '97 Toyota Camry I asked about a number of months ago. Symptoms of a bad alternator are dim lights, service engine light, odd noises, electrical issues, engine stalling and a dead battery. Your car will run on the battery alone until it's drained when the alternator dies. Bad Alternator Sign #3: Strange Sounds An alternator has a lot of moving parts that spin when it’s working correctly. The alternators job is to provide power to your vehicles accessories (headlights, stereo, etc) through induction. If the current out of the alternator has stopped being DC and become AC, the LED may not illuminate. went off (one of them being "check the battery charging system"). There are certain signs of a bad alternator to look for: While running the car, note the brightness of the interior lights. If the alternator was dead or bad you wouldn’t be able a drive for a few miles after a jump start. The DIC says "Battery not charging" So I assume the alternator is bad. It's not a bearing noise. Because the alternator is connected to (and critical for) other vehicle systems, any mechanical auto problems can have an effect on its function and have an effect on diagnosing car problems. With everything working correctly, battery voltage with the engine running should be right around 14 volts (12. A bad alternator can result in dim headlights while driving, or shortened battery life. Yesterday we replaced on a Mitsubishi Town Ace Minicar the timing belt and the belts for alternator + defective belt tensioner (bearing was running rough), water pump and AC compressor and the water pump. Replacing the alternator is a simple job that requires hand tools and beginner level mechanical ability. An Automotive component rebuild shop can upgrade you stock alternator for $1. Long story short, check out the alternator and the battery. I had one fail on my truck and it was letting nearly 1v of AC into the system which made the computer have a few issues amongst other things. Symptoms of a Bad Starter If you are looking for a listing of prime symptoms indicating a bad starter, you have landed on the right page. My thing now, is that I think that we've ruled out the alternator for the reason that it won't start and just quit running while I was driving it. For my heater blower, I'm not getting nearly enough voltage (3v) and at my radio i'm getting 22V. My question here is in general and also still concerning the '97 Toyota Camry I asked about a number of months ago. I am, of course, hoping that it's a battery because quotes from two different Honda dealerships place the cost of replacing the alternator at about $700 with labor. Common Symptoms of a Bad Alternator or Charging System Indicator Light On Usually, the first sign that your charging system is in trouble is a "battery," "ALT," or "CHARGE" warning light illuminating on your instrument panel while driving. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy). Most Common Symptoms of Bad Alternator The following are some of the things that can tell you that your alternator is bad. It could be a bad alternator. The 6 diodes are built into the aluminum rectifier and the only way they can be replaced is by replacing the whole rectifier assembly (about $20). Thankfully both are fairly simple problems to fix. An indication of a bad starter motor is the absence of other electrical problems that can be more easily tested. Disconnect the wires from the Stator to the Regulator then hook your meter to the Stator and run the engine at full throttle. That's an incredibly important point to keep in mind, so let's read that again. Alternator charging voltage can be checked using a digital multimeter at the battery terminals. I think they wanted $300 for the rebuilt unit. Once the output is within range, the light remains unlit. Symptoms of a Bad Alternator. If the alt is bad usually the CHARGE and BRAKE lights come on. Assuming my alternator is good, what could cause these problems?. 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. 5L how many amps do I need and where to go and get it reasonable. 7volts the whole way home on Sunday, indicating the batt voltage was low and the alternator was trying to charge it the whole time B) there was no appreciable charge on either of the 25 minute trips to or from work on Monday to charge up the battery, even though the system was reading 14. Bad outer and inner alternator bearings (large and small silver cylinders in the cutaway image above) can produce a whining noise. The primary motor starts your car’s engine by turning the crankshaft and the solenoid engages the drive gear. 5VAC, if you get more, your rectifier bridge on your alternator. These are the basic symptoms of a bad alternator: The vehicle's (whether it's your car or a customer's car) instrument cluster has the battery light on. If it checks out ok try replacing just the belt to see if it was just the belt. 5 Signs Of A Failing And Faulty Alternator 1: The Warning Light. You might notice problems with other electricity-drive features, including the sound system and the windows, which are all powered by the alternator while the car's cruising. A lot of people have trouble distinguishing the symptoms of a bad battery versus a bad alternator. 5 Common Bad Alternator Symptoms. This is also known as cranking the engine. If your alternator is completely broken your car won't start because the alternator will drain your car battery and therefore you cannot even start your car. Car Shuts Down Shortly After Being Jumped. An alternator with bad bearings will make an audible growling noise as it spins. The telltale sing of a DEAD alternator is having all your lights going on (battery,oil and handbreak) at the same time. Test B - If there is little or no magnetic pull at the pulley shaft or at the rear bearing, initiate the following test: 1. Answers from doctors on symptoms bad alternator. No one carried an alternator for my car. Also, I noticed a lot of hessitation as I take off from a stop. a bad alternator could drain the battery even when the car's not running but certainly when the car is running. 5a fuse (under the hood) for the alternator keeps blowing. '95 850GLT Bad Alternator Symptoms. Whining could just mean the belt is loose. The common signs of a bad automotive alternator include a weak battery, dimmed headlights, an odd or burning smell and a whining or grinding noise coming from the front of the vehicle. My concern is that the brand new battery I put on there two months ago has already died. An alternator's job is to generate an electrical charge to recharge your battery as your vehicle depletes the electrical charge the battery carries. Three things can fail and give about the same symptoms on your car: The Battery (A bad or dead battery) The Starter The Alternator or Generator. If you live near one of our stores our automotive service staff will be happy to help you diagnose and fix such issues so you can get back on the road again!. Bad Alternator symptoms?! 09-19-2009 07:07 PM #1 Alright guys, heres the specs. Symptoms of a bad alternator are dim lights, service engine light, odd noises, electrical issues, engine stalling and a dead battery. With everything working correctly, battery voltage with the engine running should be right around 14 volts (12. If this is what is happening, you can use jumper cables. Apply now to get payday loan up to 1000$ in your bank account! Instant approval and easy process. If the AC voltage is more like 0. But if your alternator is bad or failing, you'll often see the following signs far in advance of your nightmarish morning. A glance through this article will help you in diagnosing the associated problems quite easily. If the alternator was dead or bad you wouldn’t be able a drive for a few miles after a jump start. My thing now, is that I think that we've ruled out the alternator for the reason that it won't start and just quit running while I was driving it. The common signs of a bad automotive alternator include a weak battery, dimmed headlights, an odd or burning smell and a whining or grinding noise coming from the front of the vehicle. While the car is running, simply turn on the headlights, and while the car is in park, slowly press the accelerator. The next in the list of bad alternator symptoms is weird noises. '95 850GLT Bad Alternator Symptoms. And I can limit driving to just in town. Bad taste in mouth, Dizziness, Headache and Nausea or vomiting. but also check the idler pully and ten. Who would have thought the bearing would go bad, be loud and the pump not leak ?. A regulator is a rectifier & filter proving a stable voltage to charge the battery. I have replaced my alternator 2 times in the last 10 days. The starter is the only part of the truck that uses the rear battery. Bad diodes can also allow current to leak from the battery back through the alternator to ground, causing the battery to run down overnight. Then start the truck up and make sure belts are tight and nothing is slipping. If you're. The alternator's job is to recharge the battery while you're driving once the battery has started the car. You may have to register before you can post: click the register link above to proceed. Testing to see if the alternator is BAD or not, on your Ford (or Lincoln or Mercury) 4. Not only you will find combustion systems and transmission parts that help the car move, but you will also see those electrical parts that need to function correctly or the car won't do its job. symptoms of blown alternator fuse -- 2006 Sienna Results 1 to 6 of 6 Discuss symptoms of blown alternator fuse -- 2006 Sienna in the alt. If you see your lights or dashboard dim while you use your power windows, turn on your AC, or press on the gas, your alternator might not be giving enough electrical current to your car's systems. It can be hard to determine if you’re dealing with a battery or an alternator problem. I pulled the battery and will take it over to Toyota at 7 AM tomorrow for testing and likely replacement under warranty. 10 Symptoms of a Bad Alternator Belt & How To Replace It Apart from the engine and the wheels, there are many other parts in a vehicle that make it run. If this is what is happening, you can use jumper cables and another vehicle to get you started, but you will need to have your alternator tested or replaced. How does one tell the difference between a bad battery and a bad alternator? My car will not crank, but has some power (the dome lights, panel lights and power locks work). The ignition coil receives a voltage of 12V from the car's battery and multiplies it to a higher voltage level. Alternator Failure. A series of small coils pertain to the battery charging system and of course are also pertinent to the tachometer's operation. Top 10 Signs of Alternator Problems. Since load testing an alternator will conclusively confirm the presence of bad diodes or failed windings, the value of measuring or viewing ripple exists mainly as a quick test. Like a battery, the alternator slowly wears out over time. we tested the alternator but it is fine at 15 amps. The most simple of symptoms: when your alternator begins to malfunction, 2: Unusual noises. When you turn the ignition key, a relay mechanism switches on the solenoid,. Check the battery and the Alternator. We’ll cover the symptoms of when an alternator goes bad, and how to diagnose a bad one (which is really pretty easy). This can often give you bad results but if you find an open or large drop it may be an indicator to pull the connectors and do the test right. light was on while driving it home after buying it, drove 2 hours home perfectly fine. The symptoms of a bad alternator can look similar to those of a bad battery, but there's one test that always works. Symptoms of a bad alternator. i replaced the alternator and my lights are still dim and only running at about 11 to 12 volts while idle and driving. The other day it lost power and then cut off and would not restart. The replacement went out almost immediately and it took 3 months to convince service to give me a new replacement which as you should know are rebuilds. A lot of people have trouble distinguishing the symptoms of a bad battery versus a bad alternator. The alternator's charging output flows through six diodes in the rectifier assembly before it goes to the battery and electrical system. If you look closely you will see the deep scoring in the commutator rings. Symptoms Of A Bad Serpentine Belt Just about every vehicle has a serpentine belt. Although the alternator was changed, it still a possibility the alternator goes bad (was a brand one or re-condition). Bad Alternator or Battery ?? When I start my 04' 6. The truck runs great, never skips a beat. replaced the battery and when the battery was fresh all the lights went off and everything was fine. Here is a listing of bad alternator symptoms, which will provide you with an advance warning of alternator failure. While this particular problem can be symptomatic. Playing next. When the alternator malfunctions or stops working altogether, it can mean inconvenience, expensive repairs, or a break down. But if your alternator is bad or failing, you'll often see the following signs far in advance of your nightmarish morning. Understanding the warning signs of car alternator problems will help to avoid expensive repairs and inconvenient breakdowns. No one carried an alternator for my car. So I just recently bought a 07c rcsb v6. Dim lights, buzz in the stereo or a dead battery could all be causes of a. Can you tell me what the common symptoms of a bad alternator might and how I can check it myself?. A little techie talk here. I am, of course, hoping that it's a battery because quotes from two different Honda dealerships place the cost of replacing the alternator at about $700 with labor. If the alternator was bad, then driving to autozone and then back could be enough to drain the battery - particularly since it sat for a few days after that. I pulled the battery and will take it over to Toyota at 7 AM tomorrow for testing and likely replacement under warranty. Strange Noises The serpentine belt could have stretched with age and may not be spinning the alternator pulley effectively, leading to a lack of charge. Alternator Replacement Cost A variety of alternators are available in the market depending on a number of poles, rotors, output ratings, working phenomenon, rpm (revolutions per minute), type of coil and the way it is. It's easy to tell when your car is having problems, but figuring out the cause of those problems can get confusing. went off (one of them being "check the battery charging system"). I also see when my lights are on they dim up and down as the engine rev's itself to stay on. That's why I thought it was the alternator, because I didn't think I new battery would be dead after two months. i replaced the alternator and my lights are still dim and only running at about 11 to 12 volts while idle and driving. Symptoms of a bad alternator? (fixed!) tl:dr I was having some issues and the alternator died after fixing it and installing it back, it seems some other problems were related, since some of them disappeared. WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms bad taste in mouth, dizziness, headache and nausea or vomiting including Middle ear infection, Labyrinthitis, and Constipation (child). When you start your car and you just hear a clicking sound it's usually one of three things: a bad battery, a bad alternator that then drained your battery or you may have bad cables or ignition. This indicates, low charging level of the battery, which could be a result of the alternator not performing well. A voltage regulator maintains an even flow of electrical power to an automobile's electrical systems, including the headlights, dashboard components and the stereo. It’s best to have your charging and starting systems checked before assuming the alternator is at fault. Second, while depressing the brake pedal the vehicle intermittently did not slow down. Open the hood and listen closely near the alternator with the engine running. Yesterday we replaced on a Mitsubishi Town Ace Minicar the timing belt and the belts for alternator + defective belt tensioner (bearing was running rough), water pump and AC compressor and the water pump. If space is an issue this is the way to go. As an alternator has rapidly moving parts, you might also hear noises if something is wrong. went off (one of them being "check the battery charging system"). I looked it up and it pointed to a bad alternator. If your alternator is completely broken your car won't start because the alternator will drain your car battery and therefore you cannot even start your car. If you can safely get to the alternator while the truck is running you could test it with a multimeter set to 20v. It sounds like the alternator is bad. Symptoms of a Bad Alternator, alternator problems Symptoms of a bad alternator include hard or slow cranking when you try to start your vehicle, lights that seem too dim, and of course the red BATT, ALT, or GEN light glowing on the dash. The alternator delivers electricity while the car is running. A burning rubber smell becomes noticeable when the alternator is going bad because the alternator works with the belt system. The diode's simply rectify the AC from the alternator into DC. Alternator charging voltage can be checked using a digital multimeter at the battery terminals. What is the most common cause of alternator failure? The component that has the highest failure rate on most alternators is the Bridge Rectifier. Or maybe it lights up only when accessories are activated. It has been hard to start after it gets hot for a while. 7 volts the whole time. Since the alternator is working with a system of belts, failure may cause a belt to struggle and heat up, producing a burning rubber odor. Symptoms Of Bad Failing Starter. The alternator can cause parts of the engine to fail 3: Failing headlights or electronics. symptoms of blown alternator fuse -- 2006 Sienna Results 1 to 6 of 6 Discuss symptoms of blown alternator fuse -- 2006 Sienna in the alt. What are the symptoms of a bad ipr? I'm working on an 03. Your alternator provides the electrical current necessary to keep your battery charged. The alternator is an integral part of the electrical system, and its failure can stop the operation of the entire vehicle. Car is all stock on the inside with factory radio and nav. When the alternator of your Chevrolet Tahoe is not working correctly, you cannot miss it. Most cars are this way cause it's cheap to manufacture. went off (one of them being "check the battery charging system"). I hate to imagine what a dealer would charge for this service. 5 volts or more, you can be certain you have bad diodes in the alternator. Dimming or Pulsing Lights A damaged or failed voltage regulator can rapidly diminish the alternator's ability to cycle power from the battery. Can you tell me what the common symptoms of a bad alternator might and how I can check it myself?. Symptoms Of A BAD Alternator. Or your diode trio could be bad (about $5). To know if your car alternator is bad, first test the headlights. The vehicle has to be jump-started with another car or jump-start box (or whatever method). The other day it lost power and then cut off and would not restart. Does a Bad Alternator lead to power loss of the Engine Does a bad alternator lead to power drain from the engine. symptoms of bad alternator. When the alternator is going bad, 4. Weird smells. You may have to register before you can post: click the register link above to proceed. While doing this, if the headlights start to dim or even get brighter, this could be a sure sign that the alternator is going bad. Only then can you be sure that your automobile has the energy it needs to run properly. The battery will continue to not receive a correct charge, so it will die down again very quickly. My brother has a Corolla just like mine, and when I tried unplugging the battery on his, the car stayed running. If you look closely you will see the deep scoring in the commutator rings. If the car dies then the alternator is the problem. The lifespan of an alternator in newer vehicles is typically anywhere from 6 to 8 years for most people. That’s a sign of a bad alternator. If you feel any of them or your driving experience is being interrupted for any of these, you must fix the issue by repairing or replacing. The most obvious symptom of a dead battery is when the car won't start. That could be a sign that the alternator is not charging it well enough. Notice how short the brushes are. Notice I didn't say that the alternator's primary job is to recharge the battery. When it is very cold outside, before you start your car, Turn on your headlights for a min or two, and turn it off again. The alternators job is to provide power to your vehicles accessories (headlights, stereo, etc) through induction. Conclusion. Symptoms of a Bad Alternator Seal in a BMW by techplusaadmin December 11, 2018. The seal itself is made up of a durable rubber material, but over time, it can become brittle and is susceptible to leaks. Other problems, such as a bad battery or starter, may produce some similar symptoms. light was on while driving it home after buying it, drove 2 hours home perfectly fine. Your vehicle starts easily with a jump-start, but only runs a few minutes until it stalls. To perform the headlight test, start your car and turn on your headlights. ALTERNATOR AND VOLTAGE REGULATOR.