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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3
votes
2answers
21 views

Grind/Crunch Sound Near Alternator (video)

1983 Chevy 305 small block. Hearing a grinding sound near the alternator. Is this a bearing or something grinding near the belt ? Not exactly sure how to diagnose. Video: https://www.youtube.com/...
1
vote
1answer
29 views

Do Ah in Car batteries matter as much if your alternator is working correctly?

Do The amp hour ratings on all car batteries really matter as much if your car alternator is working well? Ah is the capacity but if you have reliable charging do it still matter as much? Cause its ...
4
votes
1answer
29 views

Is the diagnosis from a battery/starter/alternator tester meaningful?

At many auto parts stores they will test - often for free - a vehicle's electrical system by attaching a device to the positive and negative terminals of the battery. That's all they do. Then you ...
7
votes
2answers
48 views

How To Remove The Alternator From A 1998 Toyota Corolla 1.3 4E-FE Engine?

I need to remove the alternator from a 1.3 4E-FE engine in a 1998 Toyota Corolla, but have ran out of ideas to do it. This is the photo of the alternator in situ: To the right of the alternator is ...
3
votes
1answer
31 views

Is my voltage regulator really bad?

Yesterday, my wife's car (a 2009 Toyota Sienna AWD) wouldn't start, and this came clear out of the blue. A jump fixed it. We let the car sit idle for a good 30 minutes, and it was able to start up ...
2
votes
2answers
156 views

How can I identify which alternator is the right one?

I need a replacement alternator for my 1993 VW Mk1 Cabriolet (aka Rabbit). Unfortunately, the identifications on the old alternator are painted over. I cant ID it. On sites I've looked at there ...
5
votes
1answer
59 views

Why would my Toyota Corolla die soon after starting it?

I have a 1996 Toyota Corolla DX with about 200k miles on it. It runs good for the most part, but recently had a problem where it would not start. Napa tested my alternator, which failed, so I ...
1
vote
1answer
26 views

1991 Pontiac Grand Prix 3.1 Liter - Alternator replacement fail

1991 Pontiac Gran Prix SE 3.1 liter 6 cylinder. Alternator positive red wire from starter grounded out and split apart. What happened and why? How do I fix it? Is it safe to drive again?
6
votes
2answers
45 views

Does Coil rewinding have a negative impact with the existing system?

I have a question towards the rewinding of a coil. Here is the tech spec of the bike:- Battery : 9 Ah, 12 V Generator : 12V, 100 W Fuse: 12V 10A My bike comes with an electrical spec of DC (...
2
votes
1answer
28 views

Draw more current than its original ouput

I am have a battery capacity of 9 Amps 12 V. Factory electrical system of the bike is DC (horn, indicator, etc.) + AC (head light). Now I have changed the remaining AC to DC. (light system with ...
1
vote
1answer
33 views

How to repair and clean alternator [duplicate]

My car won't start and it's because power steering pump slings oil on it. I was told that I had to clean it to be able to have it charge. I need to know if I clean my alternator from all that sludge ...
4
votes
2answers
30 views

2006 vauxhall astra keeps having battery drained and wont start

Hi i bought an 06 astra in october and since then its had 4 batteries and a new alternator but it still dies over night. I was told potentially the radio was draining it and that was a knows fault. I ...
13
votes
1answer
128 views

How to determine exactly what's wrong with my alternator?

My 98 Mazda 626 GF 2L uses an 80 amp fp34 A2TB0191 alternator with an internal voltage regulator. I did a little test where it I turned on the bright lights, AC, radio, rear defogger and opened the ...
5
votes
1answer
36 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 ...
11
votes
3answers
2k views

Why can't alternators provide full current at idle?

I was reading about load testing and full fielding alternators in a few different books I've got, and one of the points they all made was that to test an alternator's maximum output (or close to it) ...
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
30 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 ...
3
votes
0answers
29 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 ...
2
votes
2answers
58 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. ...
1
vote
1answer
23 views

Changed alternator bought new battery will not start

Got a new battery it would start. But auto zone told me alternator was bad. Changed it now i have nothing no crank or start. Hooked it all back up like it was
4
votes
3answers
78 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 ...
3
votes
0answers
33 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, ...
7
votes
2answers
63 views

Multimeter Voltage doesn't match ECU Voltage

I was messing around with electrical loads on my 98 Mazda 626 GF 2L today and noticed that the voltage I was reading at the battery with my multimeter, didn't match the voltage the ECU was report via ...
3
votes
1answer
26 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 ...
7
votes
2answers
60 views

Semi-permanent power inverter

I'd like to install a semi-permanent 500 watt inverter connected to the car battery for greater power delivery. The battery is in the passenger area, so there's no need to run wiring through the ...
4
votes
4answers
238 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 ...
6
votes
0answers
53 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 ...
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. ...
4
votes
1answer
52 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. ...
10
votes
6answers
1k 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
58 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
74 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 ...
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 ...
7
votes
1answer
94 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 ...
13
votes
4answers
323 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?
4
votes
1answer
59 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 ...
2
votes
1answer
90 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
1answer
75 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 ...
1
vote
1answer
192 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
80 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 ...
4
votes
1answer
123 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
59 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 ...
5
votes
1answer
102 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 ...
7
votes
2answers
68 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 ...
6
votes
1answer
93 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
62 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 ...
7
votes
1answer
175 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
117 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
174 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
535 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 ...