Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have an 02 crown vic with 55k on it in the shop, it’s

Customer Question
spiking voltage when driven or...
I have an 02 crown vic with 55k on it in the shop, it’s spiking voltage when driven or revved up, i changed out the alternator and it is still doing the same thing, it puts out 19v at the alt. What else do i look for or is there a simple fix. Some say the ecm controls the voltage regulator, but the best i can find is that’s only on 03 and newer and police set ups, this car doesn’t have the police package.
Submitted: 6 months ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 13 minutes by:
11/9/2017
Ford Mechanic: Scott W., Ford Technician replied 6 months ago
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,595
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.
Verified

Hello my name is***** me take a look at a wiring diagram, give me a few minutes thanks.

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 6 months ago

Ok on this year the regulator is built into the alt. First check the large cable and the yellow with white wire, you should have battery voltage here all the time key off. Let me know if there is power here. The light green with red should have battery voltage with key turned on. You may need to check voltage drops while the engine is running also, but I can tell you how to do that later, I will wait to hear if the power on the wires is ok first.

Ask Your Own Ford Question
Customer reply replied 6 months ago
Ok I’ll let u know in the morning.
Ford Mechanic: Scott W., Ford Technician replied 6 months ago
Ok, I am usually online in the evenings.
Ask Your Own Ford Question
Customer reply replied 6 months ago
If I unplug the voltage regulator the system appear to work, I've got 14 coming out of the alt and 14 at the positive terminal unhooked from battery. As soon as plug up the regulator shit goes crazy how's this possible to seem to work correctly when unplugged.
Ford Mechanic: Scott W., Ford Technician replied 6 months ago
Have you checked for voltage on the yellow with white wire?
Ask Your Own Ford Question
Customer reply replied 6 months ago
Colors don’t match up
Ford Mechanic: Scott W., Ford Technician replied 6 months ago

What are your colors?

Ask Your Own Ford Question
Was this answer helpful?
Ask Scott W. Your Own Question
Scott W.
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,595
3,595 Satisfied Customers
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.

Scott W. 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:

AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on.

Rich DUSA

Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me.

MollyUSA

I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service.

Jason V.Kirkland, WA

I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there.

BRNew Jersey

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

< Previous | Next >

Meet the Experts:

Ron

Ron

ASE Certified Technician

24,610 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

28,466 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Richard

Richard

ASE Certified Technician

1,524 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

Mike V.

Mike V.

Auto Service Technician

1,455 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

< Previous | Next >

Related Ford Questions
Why does my car keep dying even with a new battery and alternator?
Why does my car keep dying even with a new battery and alternator? The battery light stays on but sometimes will go off for a few seconds. I guess that is when the alternator will charge the battery a… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,610 satisfied customers
2006 ford escape: light came back..new battery..ground..about 20 min
2006 ford escape changed alt was not charging. new alt went in no problems other then where it is but no the light came back on alt is only putting out 11V and 6 A ? new battery was installed 4 months… read more
Alex M
Alex M
Automotive Technician
Diplom
858 satisfied customers
2003 ford expedition: My battery..alternator..fusible link..relay
My battery charge light lit up on my 2003 frod expedition 4.6L. I changed the battery and the alternator and the light is still on. I checked the fusible link to see if it in tact and also checked the… read more
mustangmike
mustangmike
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
492 satisfied customers
I installed a new alternator in my 2005 2.3l ford escape and
I installed a new alternator in my 2005 2.3l ford escape and it is not charging the battery. I checked the fuse and it is good, the battery was tested and it is good, the 3 wire plug is good, and the … read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
I've changed the alternator and battery and the battery
I've changed the alternator and battery and the battery light comes on until I hit 2800 rpm. But tonight, with no auxiliary accessories but head lights and dash running the battery went to no power an… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,466 satisfied customers
The alternator is not charging the battery. We have tested
yes we have tested the battery and no it is not leaking … read more
roy
roy
Associate Degree
3 satisfied customers
The alternator just stop supplying voltage and its not
the alternator just stop supplying voltage and its not charging the battery … read more
Michael
Michael
Automotive Technician
High School or GED
257 satisfied customers
Where is the fuse for the alternator? Had alternator
had alternator rebuilt, but still not charging battery, so we figure its a fuse?… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
No power to alternator at and red wire, 2003 f250 7.3. let
2003 f250 7.3. let truck run for about 10 min and rechecked and it has no volts … read more
Scott W.
Scott W.
Ford Technician
3,595 satisfied customers
Alternator doesn't start charging until battery is
alternator doesn't start charging until battery is completely dead … read more
Michael
Michael
Automotive Technician
High School or GED
257 satisfied customers
Replaced batteries, alternator and voltage regulator plug,
replaced batteries, alternator and voltage regulator plug, but I still have a battery light on … read more
Jagmaster
Jagmaster
Bachelor's Degree
346 satisfied customers
2001 f350 7.3, alternator quit charging, changed alternator
2001 f350 7.3, alternator quit charging, changed alternator and now charges for short time and voltage gradually drops, I've been a semi mechanic for 12 years and own my own shop, saying that.... I do… read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
2004 expedition charging system problems. Replace alternator
2004 expedition charging system problems. Replace alternator & battery. Battery light says on and info center says check charging system. No odbII codes come up. What might it be? Have 14 volts at bat… read more
Drew(supermazdatech)
Drew(supermazdatech)
Senior Mazda Tech.
Vocational, Technical or Trade Scho
2,215 satisfied customers
2006 ford: check charging system light keeps coming on...ve checked
I have a 2006 ford 500. The check charging system light keeps coming on. I've checked the battery and it's ok. I've checked the alternator and it check ok. What is causing this?… read more
molurch
molurch
Owner
Vocational, Technical or Trade Scho
941 satisfied customers
2003 ford f250: the alt still not charging help
2003 ford f250 6.0 alt not charging... replaced the alt still not charging help.… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
Ford Explorer Making Noise When Stepping On Gas Pedal.
2002 Ford Explorer is making a ticking sound when I step on the gas pedal. I went to get an oil change and thought that might be the problem but the ticking sound continues when I accelerate on the ga… read more
Dr.Automotive
Dr.Automotive
Associate Degree
62 satisfied customers
2005 FORD MUSTANG: DASH BOARD..chec..BATTERY LIGHT CAME..LOOKS FINE
HELLO, I HAVE A 2005 FORD MUSTANG 1ZVFT80N955147744. THE CAR SHOWING A MSG AT DASH BOARD "CHECK CHARGING SYSTEM" AND THE BATTERY LIGHT CAME ON BUT THE CAR LOOKS FINE CHARGING AROUND 14 V. WHAT COULD B… read more
Shawn
Shawn
Self Employed
Vocational, Technical or Trade Scho
3,663 satisfied customers
ford escape: battery light
I have a2005 ford escape, battery light is on and it's not charging, I know the computor helps the alt to work, Can i fix this my self ?… read more
HDGENE
HDGENE
Master Technician/Lead Technician
Associate Degree
2,835 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