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
votes
4answers
151 views

How to replace Alternator out (2001 Nissan Sentra) [pictures inside]

I am trying to remove the Alternator on my Nissan Sentra 2001. I believe I need to take the alternator belt off. It's tightly on the pulley - see picture How to make the belt loose? I am told that ...
5
votes
0answers
30 views

VW Transporter T5 - p1503 Generator Terminal DF (Load signal) Signal Improbable

I have a VW Transporter T5 2007 with 2.5 TDi BNZ engine. I have the following fault code (among many): p1503 Generator Terminal DF (Load signal) Signal Improbable. This fault code gets repeated ...
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
55 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 . ...
6
votes
0answers
73 views

Alternator isn't charging battery properly. Replace or swap regulator only?

I have a 2015 Honda Fit EX. On my dashboard, there is a small screen that has been displaying "CHECK CHARGE SYSTEM" and displaying warning lights (TPMS, power steering, and stability control). I ...
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 ...
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. ...
9
votes
6answers
9k views

Noise in stereo that changes pitch with engine RPM

This is a question of curiosity. I have a '98 Acura Integra, a cheap car stereo with a 3.5mm aux in, a cheap inverter and a smart phone. If I have the smart phone audio hooked up to the car stereo and ...
7
votes
4answers
41k views

How to diagnose a starter motor that does not work

My e46 M3 would not start when I got to the parking garage after work. When I first turned the key, I heard a sound like grinding gears, but I was so startled that I immediately stopped trying to ...
6
votes
3answers
371 views

Kawasaki EX650 - What causes a stator to burn out?

My motorcycle recently required a new stator (plus a new regulator rectifier and battery) because the stator burnt out and fried everything. What are the typical causes of a burnt-out stator? Does ...
10
votes
5answers
923 views

Can a car AC unit be run on just the car battery?

This might be a silly question but I was wondering if a car AC unit be run off entirely on battery or alternator? As this could help in Preventing power loss during important times such as ...
4
votes
1answer
40 views

one wire alternator

I have a one wire alternator on 350 Chevy V8 in a 57 Belair. After charging the battery and running the car for about an hour the battery will run down. Changed the alternator but no difference. ...
13
votes
4answers
205 views

Can a weak battery destroy an alternator?

I've heard a story that a weak vehicle battery can destroy an alternator or cause an alternator to fail early. Is this true, or is it largely fiction?
7
votes
1answer
807 views

DIY Alternator Belt Tensioner

I've got a diesel engine in my boat, but the previous owner had somehow snapped the alternator bracket, and fitted it fixed to the boat rather than the engine. Now the alternator doesn't move when the ...
-1
votes
1answer
216 views

2011 Chevy Traverse alternator problems

I have a 2011 Chevy traverse. I Went to O'rielly's and had an alternator tested. They said voltage regulator failure. Had the alternator changed out. Still showing at a different O'rielly's ...
4
votes
1answer
43 views

The Testing Procedure for the Mazda 626 Alternator in the WSM is Unclear

I have some questions regarding the alternator testing procedure outlined in the 98 US work shop manual ( this is related to my battery warning light question ), my car has the FS engine: When it ...
8
votes
1answer
60 views

Connecting to the Battery During Emissions Testing to Measure RPMs?

When doing emissions testing, they connect to the battery, either directly, or using the cigarette lighter socket. I'm assuming that this is to measure the RPMs, as the only other thing connected ...
6
votes
3answers
788 views

Will an auxiliary battery hurt a vehicle's alternator?

I am going to be road tripping and living out of my SUV for a while. I need a way to power a tiny portable cooler/fridge 24/7 and would like to be able to power my cell phone, laptop, and maybe a few ...
2
votes
1answer
67 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 ...
4
votes
1answer
50 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
2answers
19k views

diagnose faulty voltage regulator causing battery overcharging?

I've been having an issue with an '03 Toyota Echo. The alternator died (at least that is what I thought) as the battery kept going flat. I found an alternator at a wrecker and fitted it, and I ...
2
votes
1answer
62 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 ...
5
votes
3answers
9k views

How can I clean the dirt build-up in my alternator?

The alternator in my '04 Lumina SS is its Achilles' heel. It lasts a few years before it starts to overcharge the battery, after which the only practical remedy is to replace it. While I cannot be ...
1
vote
1answer
104 views

OIL ON MY ALTERNATOR

My 1996 XH Ford GLI LONREACH UTE with a 4.0 Tickford motor 5 sp man, had a oil leak (oil leak fixed! and I was quite proud of myself) from the rocker cover gasket, resulting in enough oil that would ...
6
votes
1answer
60 views

Alternator whines when it's cold, 2000 Toyota Camry (5S-FE engine)

I have a 2000 Toyota Camry with the L4 5S-FE engine. The car has 140k miles on it. When I first start it, the alternator whines fairly loudly. I narrowed it down by ear, then used the typical ...
5
votes
3answers
175 views

Causes of Premature Alternator Failure

I bought my car brand-new a few years ago, with only 50 miles on it when it came off the lot. It's perfectly stock - no modifications made, though some parts have been replaced for repair purposes. ...
6
votes
9answers
3k views

2 Volts on Car Battery

My car battery has gone completely flat after leaving my car parked up for about a month. Tried turning over the car today, and none of the lights on the dash light up. Ran a multimeter across the ...
6
votes
3answers
457 views

Alternator draining battery

My alternator has been draining my battery in my Datsun 240z since I swapped the engine (VQ35). It takes around 4 days to drain the battery to the point I can't start it. It charges it fine when the ...
4
votes
2answers
10k views

Mustang charging system warning light on, but battery and alternator both passed testing?

I have a Mustang that the battery light stays on. I changed the battery and the alternator was checked by Autozone, they said it was good. I need help
4
votes
1answer
99 views

Battery light flashing after alternator install on 2004 Ford Escape

I just put new alternator on my 2004 Ford Escape, and now my battery light keeps flashing on and off, and it will sometimes stay on. The battery has been checked and is charging 100 % . The alternator ...
5
votes
1answer
55 views

2002 golf dead battery - Was able to jump - Bad alternator or Battery

I have a 2002 Golf. I put the car on the drive on Friday night and tried to use it on Wednesday and it was dead. No lights, no display nothing. I came home and jump started and it ran fine. No stalls ...
7
votes
2answers
62 views

Can long term parking affect alternator?

My neighbor just told me that his mechanic informed him that leaving a car parked long term not only effects the battery, but can also deteriorate the alternator. The battery having issues makes ...
5
votes
1answer
88 views

What are slip rings with respect to a cars alternator?

This is not a physics forum, and as such I don't expect answers to explain Faraday's law of induced emf (electromotive force), which is the basic physics principle behind how an alternator is able to ...
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 ...
10
votes
2answers
1k views

Can I safely upgrade to an AGM battery?

AGM batteries are capable of being charged at a faster rate, and may draw additional amperage from the alternator if it is not regulated. Many cars that come with AGM batteries have special charge ...
5
votes
2answers
64 views

Jeep electrical/charging problem

I have an electrical problem with my 96 Jeep Grand Cherokee. The alternator whines and the battery gauge drops to zero. I put a new battery in and a new alternator and it didn't fix the problem. any ...
6
votes
1answer
71 views

Alternator grinding - Is it OK to drive to mechanics?

I have a 2000 Suburban and the alternator is making a grinding sound. The Suburban still starts up and I am wondering if it could harm other engine components (like the serpentine belt) trying to ...
5
votes
1answer
52 views

ECM Fuse Blown what to test next

Recently I was on the highway and suddenly my car broke down and it was cranking and all but not starting so I knew some fuse has blown. I removed the indicator fuse and used it for fuse which gave ...
6
votes
1answer
114 views

Battery light on after new alternator

Car: 2003 Honda Civic Si G1Wh dash cam, 400w amp, 4300k HIDs My alternator failed badly (stereo cutting off), no battery light. Replaced it with a reman Duralast, battery light is on. It shows 14.5v ...
7
votes
2answers
98 views

Battery and Alternator Pass Test - 2003 Mustang GT

I have a 2003 Ford Mustang GT, I had the battery tested and it will take a jump and start up so naturally I am thinking the alternator is bad. I take the alternator out and have it tested 3 times and ...
5
votes
1answer
133 views

Burning Rubber while driving and after

Tonight I popped out in my partners car and noticed an awful burning/chemical smell whilst driving, this smell got worse if you turned on the AC (FAN BLOWER), so I got her to pull over and had her pop ...
9
votes
2answers
338 views

Non-functional gas pedal, engine stalling, dead battery: broken alternator?

I have a 2005 Nissan Sentra. The following happened twice within a few days: I stopped at a red light. When the light turned green, pressing the gas pedal had no effect at all. However, the car ...
1
vote
2answers
79 views

Suddenly losing electrical power, but after jump start, test the battery and alternator, they seem fine

99 corolla seca. OK so first time it happened i was driving and i suddenly lost power (electrics / everything else) it just kind of putters a little and then that's it. I called roadside assist and ...
2
votes
3answers
457 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?
7
votes
2answers
14k views

Failing alternator, idler pulley, or something else?

I have 1997 Chevrolet Lumina sedan. I’m trying to diagnose a sound coming from my engine. It is a “whirring” noise that varies with the engine speed (e.g., if I accelerate, the sound becomes louder ...
2
votes
2answers
397 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 ...
1
vote
3answers
143 views

Battery dies frequently

I've had my 97 civic for a year now and the battery died about 3 months after I bought the car. Each time it died, I'd kick start it, drive for a few days, then it would die again. So I went to the ...
3
votes
3answers
292 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 ...
0
votes
1answer
40 views

Remove alternator before cleaning

Removed alternator, sprayed brake cleaner inside and out.blew it out with air reinstalled it. works fine. charging at 14.5 volts .dont know how long it will last????? Do you?
2
votes
2answers
207 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 ...