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 provides the motion to produce power.
417
questions
0
votes
1
answer
120
views
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 ...
CommunityBot
- 1
2
votes
1
answer
61
views
2014 Elantra. Put new battery in mechanic checked it over said solid car. Last night coming down I75 everything went out but motor. Now won't start?
2014 Elantra..Put a new battery in a few weeks ago and a mechanic checked everything and said it's a solid good car. Last night I was coming down I75 and everything shut off/went out but the motor ...
- 153k
0
votes
1
answer
767
views
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 ...
CommunityBot
- 1
2
votes
1
answer
132
views
Heard bang while driving, car wont start
I heard a bang right after shifting gears and I suddenly lost power to my radio and power steering. My engine was still running fine after the bang. But when I shut it off I couldnt start it again. ...
- 24.9k
1
vote
1
answer
69
views
Will a 12v alternator/generator connected in parallel to the vehicle alternator cause damage long term?
I am a computer systems administrator and I've don't basic work on my car but haven't done anything significant with car electrical.
I have an overland/adventure truck I'm building with a battery bank ...
CommunityBot
- 1
5
votes
3
answers
921
views
faulty alternator problem?
I have a 2002 mitsubishi magna, battery light came on intermittently one day and a few months later the car died mid drive, battery completely dead. i got a jump start which lasted about a minute ...
- 153k
0
votes
0
answers
28
views
Alternator doesn't charge the battery when idle with head lights on
My car is a Mitsubishi Magna TH 1999 3.5L Auto.
The alternator gives no voltage at idle with headlights & fan on. The battery gets drained. The alternator warning light pops up. If revved a little ...
- 153k
1
vote
1
answer
308
views
Alternator gone bad after collision repair
I have a 2011 Honda Accord (92k miles, being driven about 10k/less per year) that was recently involved in a low-speed front-end collision (I rear ended a car in front of me at a stopped signal when ...
CommunityBot
- 1
1
vote
2
answers
779
views
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 ...
CommunityBot
- 1
1
vote
1
answer
2k
views
Voltage measurements with the alternator running fluctuate
I own a 1994 Mazda Protege. On Sundays, I measure the voltage at the battery terminals, and register it. First with the car turned off, and then with the car idling.
The voltage with the car turned ...
CommunityBot
- 1
1
vote
0
answers
37
views
07 Ford Edge: battery and alternator problems
Replaced alternator, fuses, temperature control sensor, the plug that goes to the alternator and battery. The battery light comes on a few minutes after crank. We check the voltage on alternator and ...
- 3,643
0
votes
1
answer
64
views
Battery dead after track day but everything working
Car: BMW M3 (2006)
I went to a track day (HPDE event where I drove the car on a road course at its limit for the entire day) and at the end of the day the car wasn’t cranking. I push-started it and ...
CommunityBot
- 1
2
votes
1
answer
65
views
2002 Mercury Mountaineer V8 4.6 2W Drive
While driving on freeway going 75 MPH using cruise control, my engine stops running. I still have lights and power but no power steering or power brakes because engine was off. I put it in neutral and ...
CommunityBot
- 1
0
votes
1
answer
15
views
02 Honda civic LX battery drain
Put a new alternator in and it's charging I believe I took the negative cable off and it said running but while driving is sputters dies out and then especially when the Sun goes down when it's ...
- 153k
0
votes
1
answer
162
views
Total Electrical failure Mondeo 1.8tdci 2008
While charging a flat battery all on the Mondeo all of the electrics failed (lights, dash, not starting, Windows, ect) when I installed a new battery on the Mondeo still nothing. Any ideas on what ...
CommunityBot
- 1
1
vote
1
answer
200
views
Alternator problems: First too much voltage now not enough
I had to put in a new alternator in my 99 Isuzu Amigo. The old one burnt up. Everything seemed fine...output was around 14.4 volts, however, the plug that goes to the "S" & "L" terminals on the ...
CommunityBot
- 1
0
votes
1
answer
148
views
2007 Mercury Montego V6, Need to test the alternator output independent of the wiring harness and computer
We've had the alternator rebuilt once and replaced it entirely with a brand new one. We've replaced the battery twice. Mechanics keep insisting it's the alternator. And I quote "it's never the ...
CommunityBot
- 1
0
votes
0
answers
29
views
Long crank time when engine is warm/after car has been driven
My car has about 155,000 miles and it's a Toyota Avalon 2008 V6. A few months ago, my battery died and I got it replaced at AutoZone (by someone who, I found out, wasn't qualified). My car sounded ...
- 1
1
vote
1
answer
129
views
12 to 24v charging with isolator
I'm trying to find the best way to charge my 24v solar battery bank off my 12v bus system. The simple way seems to be a step-up converter and a diode, but I'm wondering if I can replace the diode with ...
CommunityBot
- 1
0
votes
1
answer
24
views
Need a alternator for a 94 nissan pathfinder Le V6
I have a 94 Nissan Pathfinder LE V6 and I wanna know if there is any other parts that would b compatible or a perfect fit for my suv beside an D21 hardbody, altima wit a v6 motor or an Infinity G35 I'...
CommunityBot
- 1
1
vote
1
answer
131
views
2003 Mazda Tribute lost power
I have a 2003 Mazda Tribute with the V6. The battery light will occasionally come on, sometimes it just flashes, other it stays on. I had the battery and alternator checked at two different auto parts ...
CommunityBot
- 1
1
vote
2
answers
263
views
How can I get my H.O. alternator to charge at 14.Xv?
I recently installed an Eagle High 250amp H.O. alternator in my 2015 Altima.
Immediately upon starting the engine my battery light came on.
I hooked up my OBD-II scanner and it shows that the CPU ...
CommunityBot
- 1
0
votes
2
answers
264
views
if my alternator was tested and functioning properly why does my battery and brake light keep coming on in a 08 Nissan Altima 3.5
started my 08 Altima and put it in gear and it didn't have the power to go anywhere and then the car just died. bought a new battery and everything worked fine. now my battery and brake light on the ...
CommunityBot
- 1
0
votes
1
answer
33
views
How often should I check my alternator?
Last week the alternator went out in our van while were passing through a less-than-desirable part of town. Nothing scary, but it was a long process that took an entire afternoon to get it towed to ...
CommunityBot
- 1
1
vote
1
answer
71
views
2010 Kia soul car not staying on after removing jumper cables
Car wouldn’t start so used jumper cables to start car. However, after removing jumper cables lights dimmed then car died. 2nd try Jump starting car removed cables and was able to keep car running ...
CommunityBot
- 1
0
votes
2
answers
191
views
Renault Master Battery/Charging Problem
I'm having some alternator charging issues with my Master since 1 month, today it got much worse. It is 2016 with 135k km.
Car shows up STOP and Low Battery warning, when it first started happening ...
CommunityBot
- 1
0
votes
1
answer
38
views
Voltage drop on 2009 Toyota between alternator and battery
New battery keeps dying slowly. I get 13.7 volt output at alternator but only 12.8 at battery. Thinking that voltage drop due to bad wiring between alternator and battery. Trying to trace wires but ...
CommunityBot
- 1
1
vote
1
answer
202
views
Alternator connection is bad
So I have a problem where one of the wires connecting to the alternator comes loose and stops charging my battery. I have an 08 Honda Accord. I have pulled the wire out and attempted to clean the ...
CommunityBot
- 1
0
votes
0
answers
55
views
VW Polo battery question
My (VW Polo SE TSI Mk5, 2015, 1.2, bought secondhand) car just had a new battery fitted (EFB for start-stop cars) and on checking the battery voltage with a multimeter at idle (engine on, car ...
- 101
1
vote
2
answers
410
views
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, ...
CommunityBot
- 1
0
votes
1
answer
1k
views
Little/no charging but alternator and battery test good
For the past few months, and seemingly getting progressively worse, I've had a charging problem: both battery and alternator test good (checked via charger with alternator test mode and higher-end ...
CommunityBot
- 1
0
votes
1
answer
157
views
What could cause premature failure of a brand new alternator on my 2007 Ford Escape?
The (I believe original) alternator on my 2007 Ford Escape failed last month and was replaced with an alternator from FVP. The battery was tested and seemingly passed muster. Now, three weeks later, ...
CommunityBot
- 1
0
votes
2
answers
153
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 ...
CommunityBot
- 1
1
vote
1
answer
4k
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 ...
CommunityBot
- 1
0
votes
1
answer
34
views
2006 Ford F 150 5.4 Triton motor XLT Alternator No Charging
I New Alternator New Fusible link and I still have low voltage battery light in the dash that went away I have read a lot in I Can Find The problem HELP
- 5,510
2
votes
0
answers
58
views
How did you remove a radiator fan in a 2011 Honda Accord? I removed the two screw and harness and it’s supposedly to just slide out but won’t budge
I’m changing out my alternator and gave to remove the radiator fan ti do so. I undid the screws and harness. It wont budge.
- 153k
0
votes
1
answer
85
views
Can I put a higher/bigger battery for my Suzuki XL7?
I have a 2020 Suzuki XL7 1.5L. It came with a wet-cell battery: Furukawa FB 38B19L (32Ah). I'm about to replacing my battery, and I wonder what type of battery I should consider.
I already checked ...
- 1,882
1
vote
0
answers
34
views
New alternator and 2 new batteries but still get bad battery light
Have a dual battery setup in my 2000 gmc Sierra with an auxiliary battery for my sub isolated through a relay to the other for charging had some issues with the lights dimming so I replaced the ...
- 153k
0
votes
1
answer
49
views
Does this alternator sound ok?
This is a video of me spinning the alternator, via the clutch pulley, that sound recorded very softly, do turn the volume up. And if you notice an issue please let me know
https://youtu.be/Hy7hJ07wRYU
- 24.9k
3
votes
1
answer
569
views
Have I fried my alternator through frequent use of an external charger?
Recently, on a longer trip, the battery light came on while I was driving, indicating the alternator was no longer charging the battery. The shop diagnosed a bad alternator and replaced it, which ...
- 16.2k
4
votes
2
answers
26k
views
Welding on car - damage to ECU, battery, alternator?
I had to weld nuts to the outside of rounded-out allen type bolts when removing 15-year-old rear brake calipers and carriers this weekend. As I was laying under the car welding (probably running ...
18
votes
3
answers
11k
views
Car battery at 10v, then shows 14,5v while car running after boost, then when car turns off, drops to 10v again within a minute
Yesterday car suddenly didn't start. We boosted it and drove for an hour. When parked, it would restart immediately. But after waiting 1 minute, it wouldn't start again.
Today I measured the battery:
...
- 153k
1
vote
2
answers
74
views
Max power consumption of chargers in an average car
I am planning to charge a lot of electronic devices and photo-equipment in my car (using 12V DC only). I've got a lot of chargers connected, including 100W for Macbook Pro and multiple 36W smaller ...
3
votes
1
answer
278
views
Very rapid battery drain, dies while driving
thanks in advance!
I have a 2007 Nissan Murano SE.
The primary symptom is it literally loses power while driving, going into emergency mode before finally dying all together. But no low battery ...
- 5,510
1
vote
0
answers
25
views
When alternator bolts slackened it starts putting out a proper voltage. Relay 2.2hdi
I've had some alternator woes over the past week.
Citroen Relay model II 2005 - 2.2hdi.
My alternator wasn't putting out anything:
Battery was down to 11.5v
Checked the alternator with a multimeter (...
0
votes
2
answers
104
views
Chevrolet S10 won't crank
I have a 2002 S10 that won't start. I had work done to repair an oil leak, drove it home, and it died. Thought it was maybe the battery, which had, in fact failed. I replaced the battery, and it ran ...
- 81
0
votes
0
answers
31
views
New alternator new battery
So my Toyota Corolla 2005 alternator went bad so we purchased a new one off Rockauto.com first time for me personally anyway so after replacing it and reconnecting everything I plug my Battery which ...
- 153k
1
vote
1
answer
32
views
2001 Chevrolet can’t remember the rest it a truck
Okay so when I went to crank the truck the lights where on but the moment I went to start it nothing evening went out change the battery still nothing can it be my alternator or something
- 153k
0
votes
2
answers
109
views
How much electric power does my truck consume?
I have a 2011 Nissan Frontier Pro-4x. I want to get a general idea how much power I could draw from my alternator while driving. For that, I want to find out how much power my truck uses in the first ...
CommunityBot
- 1
1
vote
1
answer
141
views
Disconnecting Negative Battery Terminal While Engine is on
When the engine is running in a steady state and the negative terminal of the battery is disconnected: Should the alternator power the engine (the engine should continue running)?
- 153k