Question about Cars & Trucks

1 Answer

Alt. not charging replaced alt no charge battery dose it have a fuse of some kind this is on 2008 mercury mountioneer 4.0

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 12,423 Answers

The charging system on your vehicle is computer controlled . Is the battery symbol light lit on the instrument cluster ? Check engine light lit . Do you know how to do automotive electrical testing ? Test the havier gage wire on the back for B+ voltage also the red wire in the connector . Who replaced the Alternator ? Ford replacement or aftermarket ? Ford PCM controlled alternator testing Watch this video ,

Posted on Dec 29, 2016

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2002 mitsubishi eclipse alternator doesn't charge when cold replaced battery replaced alt had new alt tested checked grounds all good dose this paticular car have a alt relay?


No, cars do not have alternator relays. You say it doesn't charge but checks tested ok, and obviously that can't be true. Test it again. You put a voltmeter across the 2 batter terminals. With engine off, you should get 12.5 volts. While cranking, it should drop to 10 volts. When running, it should be over 14 volts. Cold or hot should make no difference at all, unless the belt slips or something? Why do you think it does not charge when cold? You have not told us everything.

Jan 10, 2016 | Mitsubishi Cars & Trucks

1 Answer

Charging system voltage low


there are only 3 parts. but the causes are 25 or more.
1: belt missing slipping,
2: engine rpm below 800 RPM (lots of ways ,ask )
3: ALT had.
4: wiring to ALT bad.
5: bad battery or its connections, (wires)
6: bad fuse. see fuse link a11? on fFM page 20?
7: car is PCM alt controlled, it can be bad too. see 2 field wires on ALT and PCM on page 20? below?
8: battery temp sensor bad. making PCM think battery overheats.
the fSM covers all tests above.

pick car here, then pick charging.
5 alternators used on the 5 diffr.engines. got the wrong one?

the see wiring diagrams at end and chapter 20 inside, charge.
pdf page 118 for gas engine, if diesel next few.

Jan 07, 2014 | 1998 Jeep Cherokee

1 Answer

Battery light alternator


The Charge lamp comes on with the Alternator fails to keep battery charge going. (lots of way to fail, and ALT Is 100% good) it's a system. each part of it must be good, end to end.
so...
i put my voltmeter across battery, i start car, i see 13.3 to 15vdc, alt is good.
no? , i see now, 12.2v. ALt is dead, (i didnt say bad) and battery is sightly discharged, 12.6v is charged. (key off, rested voltage)
This 12v tells me the ALT is shut down. only why is the question.

how can any charge system fail,
bad battery tops the list here, they LOVE to fail.
1: belt slips.
2: belt missing
3: bad alt.
4: bad wires to ALT . (corrosion on any wire or lug)
5: fuses blown , any listed below.:
your alt is not an ECU controlled, alt ,its 100% self contained

did you ever remove the ALT and blow the 100 amp fuseable link
the first step of any alt pul, is the pull the NEG, battery lug or BOOM.

im logged in to alldata.com so can you.

and what do i see.
a 5 wire ALT. one is the frame ground, so it must not be rusty or..... it fails. frame to engine block. no rust here.

wire L , yellow.goes to dash LEDs (alt failure idiot lamps) (this works)
wire. S white goes to ALT 5a fuse, is it blown?
wire :B B/G color, goes to the 100 amp link fuse. (blown>?)
wire IG Red-white, goes to a fuse marked 10A gauge.

i think the IG wire is the voltage sense wire.
no sense, no charge. I think the whole I/P dash cluster goes dead when this fuse blows.

The S wire is the boot strap voltage sense, it wakes up the regulator .
if open , the reg stays asleep, as does ALT.
Alternators can not self start, the regulator has boot strap device
that cures that. called self excitation. so this wire is critical.
All wires except the L wire is critical. in this case.

the B wire is the big wire, it charges the battery . 50amps or more..

any of the 5 paths open , kills the ALT dead.
The REG inside the ALT can also shut it down.
eg: battery bad, with huge cell resistances. total.
eg: overvoltge for any reasons. including attempts top run car with no battery, (dont ask)
eg: over current (battery cells 1 to 6 shorted) or 25 KC lamps added.
eg: over temperature shut down.

that is about it.







Dec 31, 2013 | 2003 Toyota Matrix

1 Answer

Car will start but wont restart after running several minutes.


Is your battery any good? A bad battery will not charge or charge properly and be at the root cause of your issue.

Jul 28, 2017 | 1997 Mitsubishi Eclipse

2 Answers

I have a 1991 mercury capri. Tonight when i was driving home the tail lights and dash lights quit working and the headlights were very very dim. Is this a broken fuse problem or something else?


Check your alt.. alt voltage output should be at least 13.2, sounds like it's not charging and your possibly running off the battery, as for the dash and tail lights, there both on the same system, check the fuse.

Jul 21, 2011 | 1991 Mercury Capri

2 Answers

Have a 2008 mercury sable and the check charging sstem came on got home turned off now it wont start


the altornator may have stoped charging,,but you will need to recharge the car battery first as its now very flat?

Dec 01, 2010 | 2008 Mercury Sable

1 Answer

99 elantra alt not charging battery' installed new alt and battery and fuse good and still no charge on battery


check 10 amp ECM fuse. Your alternator voltage is regulated by the ECM. If the fuse is good, consider replacing the ECM.

b4f4aeb.gif

Oct 05, 2010 | Hyundai Motor 1999 Elantra

1 Answer

I got 04 ford focus good battery alternator but no charge also i check fuse box next t the battery and the other inside the car everything is good but my alternator still dont charge


1) check 10A fuse in the batt. juction box (eng. comp.) hot at all times.
2) check the large red battery wire to the alt. for good conn.
3) make sure the alt. is grounded properly
4) gray wire sent from the alt. to the PCM
5) blue wire sent from the PCM to the regulator (alt.)
6) small red wire power frorm the 10A fuse
if all checks out and still not charge replace the alt.

Sep 12, 2010 | 2004 Ford Focus

1 Answer

1996 aerostar charging problem.Replaced alt with a rebuilt one but still won't charge properly,gauge is showing a loss or discharge.Tested rebuilt alt and it is good,installed a used alt from wreckers and...


I recently went through a battery/charging episode. Not to sound like the wise-guy, But! try a good battery and see what kind of reading(s) you can get.
Let me know if this is of help to you.

Sep 07, 2010 | 1996 Ford Aerostar Extended

2 Answers

The altenator will not charge the battery on a 1996 mercury mysti


Check the small wires that clip into the side of the alternator, they set the Field coil in the alternator and could be causing the issue. Also, how old is the battery? If it's bad the alternator will cook the voltage regulator because it will be at max out put all the time.

Jan 19, 2010 | 1996 Mercury Mystique

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

23 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...