Question about 2004 Ford Focus

Open Question

2004 Ford Focus Zetec engine, the battery not charging light comes on and goes off for no apparent reason, I checked and the engine is running rough sometimes but it doesn't seem to be associated with when the light comes on or turns off. Is there a free schematic of the charging system I can get from somewhere to start checking all the components that might be causing this? chriskol59@hotmail.com

Posted by on

  • 1 more comment 
  • yadayada
    yadayada Aug 04, 2010

    there is a reason, whenever the battery light comes on it indicates that the charging voltage from the alternator has fallen below the minimun required to charge the battery, in the end this will cause a dead battery and strand you, the alternbator is computer controlled so it must be tested by the Ford dealer to see what the problem is.

  • chriskol59 Aug 04, 2010

    I thought the same thing except it doesn't seem to be affected by load. It comes on and goes off very randomly. For instance, at night with the headlights on it acts the same as during the day with no lights on, It also doesn't seem to be affected by turning on or off the A/C. Is there the possibility that the computer control is running the charge bad? Is there the possibility that a connection somewhere is dirty or loose? I really would like to solve this myself if possible as I'm an engineer (electrical) and I am in Mexico where there are no reliably mechanics (trust me on this point). Even the ford mechanics are not very good and here they are VERY expensive. HELP, is there a schematic I could get from anywhere or a procedure for checking the computer?
    Thanks for your quick response on this matter as I don't want to have the car running off the battery and get stranded.

    Chris Koller

  • yadayada
    yadayada Aug 04, 2010

    I know this system and what i have advised u to do is correct, folow it or not,that is up to u.

×

Ad

6 Suggested Answers

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
Richy1978
  • 23 Answers

SOURCE: engine turns over but will not start (1.6 ford focus zetec)

CRANK SENSOR

Posted on Oct 16, 2008

Ad
  • 34 Answers

SOURCE: 96 Ford Windstar runs rough, check engine light on

Sounds like you have some EGR ports clogged up, remove the intake and look at the egr ports all but
#1 cyl port will probably be at least partially clogged, hope this helps

Posted on Nov 18, 2008

chuck943
  • 783 Answers

SOURCE: 2000 Ford Explorerer rough idle When cold

what codes are present? If it is lean codes P0171/P0174 problem is most likely the orings leaking between upper and lower intake manifold if this is a 4.0L

Posted on Feb 11, 2009

  • 184 Answers

SOURCE: 2000 Focus Zetec-rough idle, very rough under load.

you haven't said if its petrol or diesel so i'm assuming its petrol since your smelling sulfur sounds if you have a misfire causes could be plugs,leads or ign coil i suspect its ign coil these are common to go.

Posted on Mar 25, 2009

  • 255 Answers

SOURCE: 2003 ford windstar - check charging system light

have alternator tested


shack

Posted on Apr 19, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2002 Ford Focus 2.0 Zetec engine has rough idle and popping exhaust. Any suggestion what to check?


Check plugs and plug wires or coils. Also do you have a check engine light on?

Oct 26, 2016 | 2002 Ford Focus

1 Answer

2002 Ford Focus, driving down road, airbag light comes on, dashlights go out, engine runs rough then quits. Restarts, goes one block, quits again.


Symptoms of a charging system problem. The charging system comprises the alternator, battery and associated wiring. If the alternator should fail to produce a sufficient or stable enough voltage for the car's electronic systems - due to a wiring short, faulty voltage regulator, or corroded electrical connector, for example - the car will run off the "reserve" in the battery for a short time until the battery is eventually depleted. (The battery itself could also contribute to the problem if it has a faulty cell or for some reason is causing the alternator to put out an excessively high voltage in an attempt to compensate.)

So a couple of quick checks: Measure the battery voltage with the car off. Yours sounds like it will be dead; the clicking while attempting to start is the starter relay not getting enough juice. Then the question becomes: Is the battery dead because of age (fails to hold a charge) or because the alternator isn't charging it? To answer this question, measure the voltage at the battery with the car running. (Jump it or substitute a known good 12V battery.) You should see 14+V. If you only see 12V or less, you're seeing only the current battery charge without any contribution from the alt.

Finally, don't assume because the alt isn't putting out anything the alt is at fault. The wiring harness and electrical connector to the back of the alt should be thoroughly examined. (The wiring connector is a known failure point on early models.) The wiring harness should obviously show no signs of burning, melting or chafing and the battery terminals should be corrosion free and tight. If the harness checks out, remove the alt and have it bench tested. Rebuilding usually gives better long term reliability than chain store bought reman units, I'm told.

Long story short, I suspect the voltage regulator in your alternator failed, the battery gave it's all trying to keep your car running, finally gave up and now you have a dead alt and a dead battery. Don't just install a new battery without doing the alternator voltage output tests.

If you're really lucky it could be as simple as loose or corroded battery terminals.

Dec 31, 2012 | 2002 Ford Focus

1 Answer

I need to find a picture which lable the bottles under the bonnet as one on them is on the min level and i dont no what it is?


Ford Focus engine diagram3242134_f260.jpg Ford Focus engine diagram - Ford Focus engine Zetec-E 1,8-2,0 l 16V Ford Focus engine diagram - Ford Focus engine Zetec-E 1,8-2,0 l 16V

1 - a tank of the hydraulic booster of a steering; 2 - a plug mouth oil-jellied; 3 - a tank of a working liquid of a braking system and clutch; 4 - the assembly block of safety locks and the relay; 5 - an air filter; 6 - a windshield washer reservoir; 7 - the accumulator battery; 8 - the identification tablet; 9 - a measuring instrument of level of oil; 10 - an expansion chamber of system of cooling.

Ford Focus engine diagram3242159_f260.jpg Ford Focus engine diagram - turbo-diesel of 1,8 l Endura-DI Ford Focus engine diagram - turbo-diesel of 1,8 l Endura-DI

1 - a tank of the hydraulic booster of a steering; 2 - a plug mouth oil-jellied; 3 - a tank of a working liquid of a braking system and clutch; 4 - the assembly block of safety locks and the relay; 5 - an air filter; 6 - a windshield washer reservoir; 7 - the accumulator battery; 8 - the identification tablet; 9 - a measuring instrument of level of oil; 10 - an expansion chamber of system of cooling.

Mar 28, 2011 | 2004 Ford Focus

1 Answer

Battery light


the battery has a bad diode in the rectifier is the most common reason.

Jan 18, 2010 | 2004 Ford Focus

1 Answer

Cooling fan operation


sounds to me like the thermostat is sticking and allowing the car to overheat. with the a/c on the fan comes on and runs constantly to keep the engine cool

Oct 22, 2009 | 2000 Ford Focus

1 Answer

2002 ford focus zx5 engine swap


SOUND LIKE A BAD CONNECTION.RECHECK ALL THE GROUNDS & CHECK THE POWER WIRES TO THE STARTER & AT THE BATTERY.IS STATER WAS BAD THE LIGHTS WOULD NOT GO OFF WHEN U CRANK.GOOD LUCK

May 06, 2009 | 2004 Ford Focus

1 Answer

Ford focus zetec 53 plate


Hi where the brake fluid goes check the wires on the cap wiggle them around and have a friend look at the light for any changes (could be faulty connection) also have the brake pads checked to make sure they are not to low and activating the sensor, if all is good there then it sounds like a faulty sensor, Hope this helps

Dec 04, 2008 | 2004 Ford Focus

Not finding what you are looking for?
2004 Ford Focus Logo

Related Topics:

447 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5520 Answers

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

Answer questions

Manuals & User Guides

Loading...