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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4
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2answers
92 views

1998 BMW 318is excessive current draw - possible starter issue

My 1997 BMW 318is started making a whirring noise that varies with engine speed, and an electrical burning smell after driving, and the battery goes flat very quickly. I measured the current draw ...
4
votes
2answers
7k views

how fast does the alternator charge the battery?

It would appear that the common word of wisdom is that car alternators provide 50A of output. I actually looked at the supposed specs for my 2008 Jetta 2.5L on the internet -- a compact car -- and it ...
4
votes
1answer
64 views

Hyundai Accent Diesel 2002 alternator works on day but not when headlights are on

I have purchased Hyundai Accent diesel 2002 four cylinder from my savings .. its start every morning but not at night when the car's headlights are on. I couldn't start it after one or two attempt . ...
4
votes
2answers
67 views

What alternator failure modes create excess drag without making allot of noise?

I was wondering in what ways could an alternator partially fail such that it would create excess drag on the engine ( enough to cause some shaking / lugging ) but not make any immediately apparent ...
4
votes
1answer
25 views

98 jeep wrangler 4- cylinder charging problems

My jeep check engine light came on. My volt meter went to 0.1. I changed the alternator and it worked for about 10 seconds and it went out. I installed another one and it did the same thing!!! What ...
4
votes
1answer
54 views

How does the ignition system control the Energy of the spark?

An automotive ignition system needs to provide a specific amount of energy to properly ignite the air/fuel mixture in the combustion chamber. Energy = voltage * amperage * duration. A specific ...
4
votes
1answer
91 views

Alternator/Battery power question

Good Afternoon, I have a 2014 Ford Focus SE that i use as my Work Vehicle. I work in Emergency Roadside Assistance. I have to run a laptop In the car in order to direct calls to other employees and ...
4
votes
1answer
381 views

How long should fusible links be?

I've installed a 12" fusible link as a replacement for a fusible link on the line that charges the battery from the alternator. I showed the OEM part to the guy at the parts store and he gave me a 12" ...
4
votes
1answer
31 views

My car Diesel Yaris doesn't start very well after an alternator change?

I have recently changed the alternator after it died in my diesel yaris. I have done about 150 miles with the new alternator however it still doesn't start very well. It now takes 1 long or sometimes ...
3
votes
2answers
637 views

Safe resistance between alternator and battery?

I am trying to figure out which awg of wire I need to get for my new, 160 amp, alternator. I found this chart which shows the resistivity/length of different wire gauges. Chances are that I will not ...
3
votes
1answer
4k views

Battery dash light comes on when starting car then disappears while driving

2002 Honda Civic EX here. When I start my car, my battery dash light has been staying on usually until I get onto the highway, then it will turn off. If I hit a stop sign or red light, then it'll ...
3
votes
2answers
802 views

'03 Mazda Tribute needs jumped every time it starts

I have a 2003 Mazda Tribute. I'm not entirely sure what the problem is with the vehicle. I suppose it could be the alternator or just a dead battery, but could also be something more detailed. I have ...
3
votes
3answers
353 views

Should fuel pump noise be changing according to electrical load and RPM?

One thing that bugs me about my car is that the fuel pump noise is fairly inconsistent. Turning on the lights, aircon, defroster, etc. lowers the fuel pump speed and gives a lower pitched noise. It ...
3
votes
2answers
5k views

Why did my car stall when I used the foot brake?

Preface: I drive a 2004 Peugeot 206, manual On the motorway the other night, one of my tires blew out. I managed to pull over and change to the spare wheel in about 30 minutes (having never changed a ...
3
votes
1answer
25 views

Missing a bolt to take out to remove alternator 2001 Nissan sentra

I am trying to remove the alternator from my 2001 Nissan Sentra. I have taken the belt off, have taken a screw out of each the left and right side (looking from the front of the car). It seems like ...
3
votes
3answers
2k views

Toyota Celica battery light on but alternator appears okay on visual/auditory inspection

Today the battery light decided to rear its head on my Celica. I know this normally points to the alternator, but given that I just replaced a bad alternator in my Chrystler, I can tell what a bad ...
3
votes
3answers
14k views

Battery light comes on after starting the car. How big of a problem is this?

On my way to work this morning, the battery light came on. I would say it was about 2-3 minutes after I started the car. My drive to work is only a 10 minutes drive, and the light was on the whole ...
3
votes
2answers
196 views

Why did replacing the battery eliminate these symptoms?

I have a 2006 Honda Civic SI. It was slow to crank when starting up, and while driving, electrical systems progressively got worse (radio would turn off and on, power steering would stop, and then ...
3
votes
1answer
33 views

2004 mustang v6 new altenator and battery

I just changed out my alternator and got a battery last week. We can jump the car and the car will drive. While I was letting it just sit to run to charge more the car cut off and nothing happens. ...
3
votes
1answer
2k views

Car won't start - replaced alternator - didn't help

I have a 5-6 years old Mazda 6 2010, 2.5L engine. My car simply won't start. I had this issue yesterday, so I called roadside assistance and they were able to jump start my car. I drove straight to ...
3
votes
2answers
200 views

2004 Nissan Altima with new alternator won't accelerate, but will rev in neutral. No power in car.

Hey internet mechanics! I replaced my alternator yesterday because it was faulty (pulling a charge from my battery and killing it every night while car was off). After installing the new alternator, ...
3
votes
2answers
3k views

Nissan Altima Alternator/Battery Problems

I own a 2005 Nissan Altima which has been having alternator/battery problems for past 1 year. My car has 112,000 miles on it. My car battery was past warranty so I had the battery replaced about a ...
3
votes
0answers
26 views

Is battery bus voltage available via OBD2 scanners for 98 Avalon?

In order to supplement the inadequate-by-design alternator BIT circuits in my 98 Avalon (alternator failures have stranded us; no instrument panel warnings of charging failure), I'd like to either ...
3
votes
0answers
30 views

Turning on Loads caused an Increase in Alternator Base Voltage

I've been having some strange low voltage problems lately. I was messing around, and decided to turn on as many electrical loads as I could, which meant the radio, high beam headlights, defroster, ...
3
votes
0answers
38 views

Citroen C2 Alternator

Please if someone could help me ill really appreciate it. I've got a Citroen C2 the Bendix of the starter was completely worn so we purchased a new starter and put it in. At first it started. Once ...
3
votes
0answers
67 views

Typical voltage drop when air con, radio, lights, etc. in use

Imagine the engine/alternator are running and the battery voltage is 14V. If I now turn on the air conditioner, radio, headlights, seat warmer, cigarette lighter, should I now expect the voltage to ...
2
votes
3answers
561 views

Are inverters bad for your car?

I bought a Duralast 130W inverter and it says 260 peak watts and it plugs into the 12V cigarette lighter. I want to charge my HP laptop with it. Is it bad for the car?
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votes
3answers
2k views

Is rebuilding an alternator a DIY project?

I'd like a high performance alternator similar to one of these. Is it possible to rebuild a stock alternator to similar output, using majority of tools one would have at a home garage? Of course one ...
2
votes
3answers
140 views

Effects of significant draw on alternator and battery

Hypothetically speaking, let's say I've equipped a vehicle with an aftermarket audio system with an amplifier that has a higher draw (in amps) than my alternator produces causing my average voltage (...
2
votes
2answers
1k views

Is alternator rating at pulley rpm or engine rpm?

I just got a new alternator for my jeep that says 160amps at 2k rpm. Is this rating for the pulley rpm on the alternator - or is it the rpm of the engine? Also, if the pulley is spinning slower than ...
2
votes
2answers
52 views

Timing belt replaced, engine dies after jump starting

I had the timing belt replaced on my 2005 Chrysler. I drove for a week, and it appears the battery died. I used jumper cables to start the car, but as soon as I took the cables off the engine died. ...
2
votes
2answers
248 views

Does intermittent starting difficulty indicate alternator or starter?

Tl;dr: Car is having trouble starting, and I'm wondering how to determine if it's the alternator or the starter. I don't experience the longer turn over times of a typical starter malfunction, but I ...
2
votes
1answer
191 views

Car stalled and restarted after some minutes

I have a very old car which uses mechanical transmission (Maruti Zen) Recently while driving on the road, I switched off the engine because of heavy still traffic. I forgot to turn off the head ...
2
votes
3answers
8k views

Rover 25 - My battery light starts flickering on/off on the dashboard

My girlfriend noticed this yesterday and thought it was odd, it stopped but started happening again this morning on my way to work, I think its a V plate.... "as I’m driving along my battery light ...
2
votes
1answer
26 views

Bad voltage regulator?

1999 nissan altima. Battery and brake light came , had it tested at o'riley alternator tested bad voltage regulator. Replaced with rebuilt alternator. Cranked car, lights are off everything is good ...
2
votes
1answer
69 views

Amplifier is causing battery drain

Okay I'm driving a 1998 Honda Civic EX and I have an audio system in my car that is about 7-8 years old now. I had done some work on one of the terminals on the subwoofers, and melted plastic in ...
2
votes
1answer
161 views

Alternator voltage range

I'm just trying to figure out the normal operating range of an alternator. The best I've found is: http://www.f150online.com/forums/electrical-systems/469058-alternator-high-voltage-15-3v.html ...
2
votes
1answer
645 views

Chevy Malibu 2009 won't start

I have a 2009 Malibu, yesterday I was heading back from school, then I started hearing a bizare sound like a whining sound, 2 minutes afterwards the engine stopped. When I got off to check under the ...
2
votes
3answers
464 views

98 Tiburon won't start and doesn't make a noise

I have a 98 hyundai tiburon. recently the battery light went on when I was driving. the next day my girlfriend left the headlights on and the battery died. We tried to jump it with no luck. I got the ...
2
votes
2answers
455 views

when trying to start my pajero it just clicks and wont fire up

pajero wouldnt start and just clicks had aa out and they said it was the alternator but tried car over weekend and it started first time. tried this morning and just click had to have a jump start to ...
2
votes
1answer
931 views

2002 Hyundai Accent not charging battery

Hyundai Accent battery will not charge. Had battery tested, bad, replaced. Had alternator tested, bad, replaced. I installed the alternator myself, from what I remember it was connected by two plugs, ...
2
votes
2answers
3k views

2004 Kia sedona intermittently wont start

my 2004 kia Sedona intermittently refuses to start. I have light, radio, electric windows but just doesn't turn over at all. If I leave it a few hours and go back to it, it'll start first time as if ...
2
votes
1answer
20 views

LEXUS ES300 '99

Ok so im having a problem that been happening for about 3 weeks. At one time we were at the movie drive in and my car died after 10min. Lights were all coming on and it would make several clicking ...
2
votes
1answer
75 views

Swift Dzire Battery Sign remains ON whenever car is started after 9-10 hrs

Swift Dzire Battery Sign remains ON in the dashboard lights whenever car is started after 9-10 hrs and Car doesn't move until the battery sign is gone. Battery Sign usually remains ON for 10-15 ...
2
votes
2answers
440 views

2009 Aveo electrical problem

I have a 2009 Chevrolet Aveo that I bought new from the dealer. Today I was running errands around town and just as I was about the get on the highway to head home, the battery light and emergency ...
2
votes
1answer
3k views

How to replace an alternator?

I've got an '05 Mazda 3 SP 2.3 and my question is how do I replace my alternator? My situation is pretty much the exact same as described on this site: http://www.mazda3club.com/showthread.php?t=...
2
votes
2answers
154 views

Battery running flat on a regular basis

I drive a Vauxhall/Opel Astra Mk5 1.8l SRi, registered in 2004. For 2/3 months now I've been having to keep a spare battery in the car as the car battery is running flat. My first thought was that ...
2
votes
1answer
137 views

Specs for a Toyota Avalon 97 Alternator?

So I was told during a check-up at a Jiffy Lube oil change that their analysis turned up a failed alternator giving 12.1V. Given that Jiffy Lube doesn't replace parts and thus gains nothing if I do, I ...
2
votes
2answers
661 views

Clicking sound when trying to use electronics in my car

I own Toyota Avensis 2001 D4D 2.0 estate. Here is the problem: https://www.dropbox.com/s/ury2rt9wct6dasz/2014-08-18%2017.25.46.mp4 When I am trying to start it - it wont even turn the starter, ...
1
vote
1answer
503 views

When is a magneto more efficient than an alternator?

A magneto is device similar to an alternator for creating electrical energy. Many small gas engines, including several road worthy motorcycles, use them to generate electrical energy. They can be ...