Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

There is a humming noise comming out of alternator in key no…

There is a humming noise...
There is a humming noise comming out of alternator in key no position pull the one wire plug and stops, also reading close to 12 volt coming out of it in just key on position, olny reason notice it is the truck randomly shuts off and loses all power, then will start back up,no fuses blown, sometimes have to reset battery sometimes you dont
Show More
Show Less
Ask Your Own Chevy Question
Answered in 6 minutes by:
1/21/2018
Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 13,440
Experience: ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
Verified

Hello, I am Randall. I am reviewing your question now and will reply shortly. You may see a popup for phone call request, That is not from me but rather the site. We can keep in this chat format or a call if you prefer.Call is an option not required. Thanks. Back shortly

Ask Your Own Chevy Question

Ok, to understand, where are you testing to see 12 volts coming out of the alternator with key OFF. the brown wire or red wire?

Ask Your Own Chevy Question
Customer reply replied 7 months ago
Call would be best
Customer reply replied 7 months ago
Brown wire, problem is truck randomly shuts off and loses all power
Customer reply replied 7 months ago
Traced Brown wire in book it should have power in keyed position

ok, I will have JA setup a call request

Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 13,440
Experience: ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
Verified
Randall C and 87 other Chevy Specialists are ready to help you
Ask your own question now
Customer reply replied 7 months ago
l will get a call

did you get my number

Ask Your Own Chevy Question
Customer reply replied 7 months ago
about to call
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Randall C Your Own Question
Randall C
Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 13,440
13,440 Satisfied Customers
Experience: ASE Master, L1, 32 years, Diagnostic / Electrical Specialist

Randall C is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
2003 chevy Silverado 1500 5.3. Bought truck with motor.
2003 chevy Silverado 1500 5.3. Bought truck with blown motor. Replaced motor with a used one. When to try and fire it for the first time and it won't turn over and can't hear the fuel pump running. St… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
We did the first of three cylces to reset the passlock data
we did the first of three cylces to reset the passlock data code but when we tried the 2nd series only the battery comes on now. … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
I have an 04 Silverado 1500, 4.8. The truck will stop
I have an 04 Silverado 1500, 4.8. The truck will stop running occasionally. I have seen several abnormalities, I will list what I can think of: (please note i plow snow with this truck but it does thi… read more
Tool Hut
Tool Hut
Owner
519 satisfied customers
I have a 2004 suburban 1500 5.3 4x4. No crank no start. I
I have a 2004 suburban 1500 5.3 4x4. No crank no start. I replaced to engine. It fired up and I did my break in procedures. When I shut it down and let it cool to check fluids etc. now it won't crank.… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Suburban 1500 LS: i think my 2007 suburban might
i think my 2007 suburban might have got hit with lightning my rear door and glass wont open,hood says its open when its not, high beams wont work and blinkers and 4 ways wont work… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Trailblazer LS: No low beam headlights on a 2006
No low beam headlights on a 2006 trailblazer have switched 45 & 46 relay checked fuses beam and still no lights… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevy Venture: I have a 2004 chevy venture. The other day
I have a 2004 chevy venture. The other day after it had been driven approx 20 miles, it was shut off for approx 15 min. When tried to start it, it just clicked like a bad battery connection. All the i… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Suburban 1500 LT: I have a 2002 Chevrolet Suburban
I have a 2002 Chevrolet Suburban 1500 flex. It shutoff and will not start back. Tested Fuel pressure and had 0 at Schrader valve in fuel rail and heard no buzzing from fuel pump. Changed fuel pump and… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Silverado Z71: I have a 95 Chevy Z71 and it keeps
I have a 95 Chevy Z71 and it keeps blowing alternators. There is one red wire going to the alternator and I am guessing that it is a feedback or exciter wire that should be 12 volts. I have it coming … read more
kwiggins29059
kwiggins29059
Associate Degree
219 satisfied customers
98 C-1500 5.0 TRUCK SHUT OFF ON ME WHILE RUNNING.STOP TURN
98 C-1500 5.0 TRUCK SHUT OFF ON ME WHILE RUNNING.STOP TURN IT BACK ON AND WAS ON MY WAY.LAST NITE DROVE TO STORE ,RETURN FROM STORE WOULDNT DO NOTHING ,NO CRANK ,NO INSIDE LIGHTS, WAITED FOR FEW MINUT… read more
Randall C
Randall C
ASE Master Tech
Vocational, Technical or Trade Scho
13,440 satisfied customers
I have a 1989 G 30,350, TBI. sat for about a year or so. Went
I have a 1989 G 30,350, TBI. sat for about a year or so. Went to start and nothing but cranking, long story short, hose between fuel pump and pick up bad. installed new pump and hose, filter too. Now,… read more
roy
roy
Associate Degree
3 satisfied customers
Chevy Silverado 1500 I have a 2006 Chevy 1500 pu. The volt
I have a 2006 Chevy 1500 pu. The volt gauge said it was not charging so I checked the altenator and then replaced it.It worked fine for a couple of hours and then was not charging again.I replaced the… read more
Randall C
Randall C
ASE Master Tech
Vocational, Technical or Trade Scho
13,440 satisfied customers
Chevy silverado 2002 replaced fuel pump, alternator, and battery.
chevy silverado 2002 replaced fuel pump, alternator, and battery. but still wake up to a dead battery… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Savana 2500: Brakes..abs light..the alternator light comes on, I..hood
I have a 2003 chevy Savana 2500, Customer said ABS was junk so he disconnected the two large wires that feed the abs motor, Brakes then worked fine but the abs light was on, He figured it had to have … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
2003 silverado 4x4 . Ran out of gas I think. Just shut off.
2003 silverado 4x4 . Ran out of gas I think. Just shut off. Now "service brake system" reads on display, ABS light on, power to everything but will not turn over. It has gas. Could not find any fuse's… read more
Matt J
Matt J
Owner of Jones Automotive
Vocational, Technical or Trade Scho
1,000 satisfied customers
2004 Chevrolet Trailblazer EXT: 4WD 5.3L V8 Automatic Transmission
I have a 2004 Chevrolet Trailblazer EXT 4WD 5.3L V8 Automatic Transmission. The wife was driving home and said it felt like it was running out of gas. Pulled over and put it into park. I went to help … read more
Dan
Dan
High School or GED
1,401 satisfied customers
2003 Chevy Trailblazer ignition key is stuck in the switch;
2003 Chevy Trailblazer ignition key is stuck in the switch; all other electrical seems fine, starts and shuts off fine, but can't turn key to full off position. What's wrong?… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
Aftermarket..the rpm guage stopped working,the tach doesnt work
we pulled out and aftermarket alarm in this truck after we pulled out this alarm the rpm guage stopped working,the tach doesnt work and also the truck wont shift out of first gear when u do it from 1-… read more
Don - Mo Lurch
Don - Mo Lurch
Auto Mech / Electronics
Vocational, Technical or Trade Scho
2,953 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x