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Questions tagged [alternator]

An engine accessory which generates alternating current (AC). The electricity is then fed through diodes which converts it from AC to direct current (DC), which is usable by the automobile in general. The alternator is usually driven by belts which are connected to the crankshaft of the engine which ...

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'91 Toyota Celica GTR (ST183) charging diagnosis

I've been working on getting a Celica up and running after a couple years of laying mostly idle, it's been dry-stored for most of it. The biggest issue I have right now is that the system is not ...
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Would could a wind turbine work for a car?

Could I attach a little fan to power a motorcycle alternator to be more efficient then running off the engine? Attach any where facing the wind on the vehicle to increase mileage from eliminating ...
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Alternator regulator gone bad 3x in one day

I have a 2008 Toyota Camry 2.4l. My problem is battery is over charging causing amplifier ground wire to blow fuses and also melt the wire, battery tested it is good. Tested alternator and tested bad ...
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Could a car be slowed by the drive shaft?

Could enough electromagnets be place around the drive shaft to slow a car and generate electricity? Or a switch that would engage electromagnets going down hill? When you apply the brakes the drive ...
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1986 Nissan D21 Connector Part

What is this? As a hint, I'm losing about 2 volts between the alternator and the positive terminal of the battery here. It appears to be the last connection on the way back to the battery, just after ...
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2002 Subaru Impreza WRX alternator/charging issues

I have 2002 Subaru Impreza WRX. The alternator went, so I replaced it. The voltage gauge was jumping up and down when fans kicked on and when I turned on accessories. I figured the alternator was ...
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161 views

Intermittent battery light on 2005 Accord

I have a 2005 Accord LX 2.4L w/ 101k miles and a few weeks ago, the battery light came on. The battery was changed last year. After checking everything, I concluded that it was a bad alternator, so I ...
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Can a new AC kill the alternator and the battery?

11 days after Sierra Shell mechanics repaired my trucks AC system, truck displays warning symbols on dash and suddenly loses all power. My neighbor looked at battery and adds water to 2 dried cells. ...
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Car chugs along after jump start but no lights work

Today I was leaving work and my car didn't start so I had it jumped by a coworker. I was driving on and noticed that my gauges weren't working and my lights weren't turning on. It also chugs along and ...
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Car starting hack works - but is it an issue with car battery, starter or alternator?

I recently noticed that my car had the issue starting without giving it a boost. It has original battery and has 155k on it. Over the course of 2 weeks I realized below two things which helps car ...
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43 views

Alternator on a boat generating 90Amps for three batteries ACR system

After several hours of thorough research, I still haven't found a satisfying solution to my problem. My electrician bought a 90 amp alternator for my boat and I count on charging three batteries ...
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I have a 2015 Kia Forte I have put two Alternators on it within the last 2 weeks why do they keep failing?

Alternator failure: have put two Alternators on within the last 2 weeks second one just failed again what seems to be the problem dealerships it has to be something other than that alternator do you ...
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How likely it is that low alternator voltage cause Xenon HID headlamps ballast to fail?

It seems that the alternator is producing a bit low voltage, about 13.4V max, while this should be over 14V AFAIK, undercharing the battery. The left Xenon HID headlamp ballast failed some time ago, ...
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55 views

Ford not starting on key turn after acc

I've got a mk3 Mondeo 1.8petrol zetec. It had bad alternator so I left it laying up for 6 months until I got around to getting a new one, but 3 weeks ago with the bad alternator in it, I started car ...
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20.2 volts on the B+ terminal of a12v alternator.

The engine on my sailboat has an Iskra 12-volt alternator that has worked fine for over 3,000 hours of operation. Just recently, I noticed that the voltmeter shows no charging, ie, only about 12 ...
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329 views

Aftermarket stereo with alternator whine

I replaced the OEM stereo unit in my 2001 Toyota Celica with an aftermarket one to have bluetooth, USB connectivity, etc. No new wires were added, I just used the original wiring with an adaptor like ...
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What would make an alternator produce flutuating voltage

The car is a 2013 Seat Mii with start/stop functionality. The alternator is faulty as the output (measured at the alternator on an oscilloscope after the regulator) fluctuates between 3V and 14.5V in ...
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How can I confirm a faulty alternator or regulator with only a basic digital multimeter at hand?

Make: Maruti Suzuki Model: 800 hatchback Engine: F8B MPFI Battery: Exide 35AH 2.5 year old Rated OCV 12.92 Location: Nagpur, India. Daytime Temp about 44C Background: Around November/December ...
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power inverter to run a shop vac. Could alternator be damaged by this?

I have a standard 200 watt power inverter which I have used to power a sound system off of my Econoline e250 on multiple occasions with no problem. I tried to run a 4hp rigid shop vac off of it and ...
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Cable run to rear truck bumper

I'm trying to install an Anderson Powerpole connector on the back of my truck. Ideally I'd like to go with the Anderson SB50 (rated to 50A) as it is widely used and compatible with various accessories ...
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1answer
42 views

Battery stops getting charged after 15-20 minutes of driving

I've got a 1998 Mitsubishi L200 pickup that has a charging problem. When I start the engine the indicator shows that battery is charging but after driving for 15 or 20 minutes it stops charging. I've ...
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1992 Nissan 2.0 (SR20DE), ABS and battery light came on while cruising

Today I was driving on the highway and all of the sudden, the enige surged a little and the ABS and battery light came on. I've stopped the engine and started it again, the engine starts easily. I ...
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278 views

Preventing alternator draining car battery

Just purchased 12V alternator to put on my '26 model T ford. Instructions said without wiring through switch the alternator will slowly discharge the battery when not running. Never encountered this ...
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2006 Vauxhall zafira 1.6 life mpv petrol

How much to replace piston ring on Vauxhall zafira 1.6 petrol sometime loss power up hill cos to bad piston ring car burning oil ?
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Building E-Bike Help

I am building an e-bike using an electric skill-saw, a car alternator, and a 20Ah battery. I have a few questions because I am new to this stuff. Should I have the motor in between the wheel and the ...
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54 views

How much accurate car cigarette lighter port is?

My car's generator is putting out 13.5 voltages when on full load (blower, ac, lights etc) but when i check the voltage on car's cigarette lighter port it it drops to even 11.6 when blower is on, when ...
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Alternator Replaced in June and March, Today the Car Stops Idler Pulley breaks off. Is this a result?

I had my Alternator Replaced in June, then again March 20th due to an initial defective alternator. I drove 1300 miles since this was replaced and today the car starts shutting off and the power ...
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47 views

Determining Expected Battery Voltage With Vehicle Running

To my understanding, a simple first-step for testing the alternator and related components on a vehicle is to monitor the voltage (using a multi-meter) at the battery while the vehicle is running. ...
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2010 Nissan Altima making noise, possible electrical that no one can help with.

Our 2010 Nissan Altima started making strange noises-sounds like knocking under the hood, especially when idling. No one can tell us what it is, when hooked up it doesn't register anything. I have ...
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2005 f350 wont run after replacing alternator

just replaced battery, alternator and truck drove for three miles before it died. Had this issue before and was able to fix by cleaning throttle body of carbon. tried that again but cant keep truck ...
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279 views

Car turned off in stop light, battery light, oil, and brake light came on?

The situation all started when my nissan sentra 2007 leaked all the coolant from a pipe down below. I couldnt find the pipe in junkyard or in any autorepair shop so i was advised to just run another ...
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39 views

Battery or alternater went bad [duplicate]

Is it true if I take the cord off the negitve side of battery n it dies, dose that mean my alternater is bad
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Is ir the starter?

I have a 2003 Chevy Malibu and I’m having issue when I try to start it. It doent turn over as a matter of fact, I attempt to turn it over and as I’m turning the ignition and giving it gas, it ...
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Should a 2004 Mazda 3 run after jumping when battery has a dead cell?

I have a 2004 Mazda 3. It got a new battery just over 2 years ago. About 8 months ago, the alternator died and I had that replaced and everything seemed fine in the months since then, including as ...
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84 views

Is a self exciting high output alternator a bad idea?

My vehicle ('12 Accord LX 2.4l) has electronics that are constantly running: Compustar Drone & Compustar EZ-GO It seems as though, the ELD prevent the battery from charging, and simply maintains ...
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731 views

Dashboard lights dim when I step on accelerator

[Car: 2001 Kia Sephia, ~107,000 Miles] I just got a new alternator put in my car, plus had a lot of other work done. Now I notice my lights are dimming on the dashboard when I step on accelerator and ...
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Car starts with Trickle charger and Battary, can start on a boost but not on battary alone

The battary on a chevrolet cruze is displaying an output of 15 volts and recharges from the alternator. However the car needs assistance from a boost or trickle charger to turn over properly. The car ...
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24 views

2002 Jeep Grand Cherokee oscillating radio alternator whine

I am getting an alternator whine through the radio, but it's not 100% consistent. It will whine for 7 seconds or so, then stop for about 30-45 seconds, and then repeat. I've tried toggling the heat/...
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03 BMW 540I M package Charging System issue

I purchased this vehicle in October 17, 90 thousand original miles 3 different owners according to carfax. Car was in perfect condition, I personally kept in garage and rarely got out for the first ...
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1answer
41 views

Acura Integra (2000) Electrical Issues

I've been having some strange issues with my '00 RS. I suspect it's the alternator, but having someone confirm would be helpful. There have been two instances of electrical problems: (2 days ago) ...
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4answers
1k views

Is it possible to replace the diodes in a rectifier?

I've got an alternator whose diodes are going bad as evidenced by excessive AC output from the alternator. The problem is that the diode assembly is a discontinued part, which I can't even order at ...
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31 views

2009 Kia Spectra P0507 code thrown after alternator replaced at the shop

Have a Kia spectra, 2009, and just had the alternator replaced at the shop, it started a little hard and idled a little low off the bat, drove it 25 miles home, idle seemed a bit higher than normal ...
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2answers
54 views

Device that prevents vehicle from draining accessory batteries?

Not exactly sure if the device / component or setup I'm asking about even exists. But, here is my naive question (I am bad with electrical in general): Is there something built into modern vehicle ...
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58 views

How to pick the right alternator replacement?

How do I determine the correct alternator replacement. I'm not a mechanic, but I think I can unscrew bolts and connect wires to replace an alternator. I ask because I'm under the impression that the ...
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1answer
681 views

battery light comes on mazda tribute

2001 Mazda tribute v6 with a NEW alternator. Will start from beginning to be clear. Original alternator went out 3 years ago. Was replaced with after market, this worked for 3 years, was replace ...
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1answer
154 views

Does low alternator load create more heat?

For example, it seems switching from some high wattage headlights to much lower wattage LED's frees up more of the alternator's power capacity. But, does this mean the alternator (or other electrical ...
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54 views

how to install dual battery in car

i live in Ulaanbaatar the coldest city and i own a hyundai verna 2006 with 1.5 turbo diesel engine. i replaced it's 12 v 80 Ah battery and glow plugs about a 3 month ago. last night we had -40 c and ...
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1answer
47 views

Is it bad alternator or starter? Camry ‘05 173k miles..

I started my car after two days of cold weather, around 20 F. After heating my engine for about 15 minuets I turned ignition off. After that it does not start, it start to crank but dies off well ...
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385 views

Car makes rattling sound after shifting gears?

Recently after I got my alternator and battery replaced, I noticed that after a night or two whenever I tried to start my car (after engine turned on), I heard a rattling sound if i started shifting ...
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58 views

Diagnosing Engine Knock

My 2003 Volvo XC70 had a slight engine knock for about 5000 miles but never showed any signs of damage to the engine. Oil was fine and it only made the sound in around the 2500-3500 rpm range. One ...