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2006 ford focus battery light keeps coming on

Battery light keeps coming on had alt check and battery checked tested good

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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csmock132
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SOURCE: 2006 Ford mustang check engine light come on

You need to have it scanned to see what code turned on the light. Check your gas cap, make sure it is tight.

Posted on Feb 27, 2009

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emissionwiz
  • 79186 Answers

SOURCE: battery light stays on

the battery light has nothing to do with the battery itself, it is indicating that there is a problem with the alternator that charges the battery, most likely a defective rectifier bridge diode has failed.

Posted on Jun 26, 2009

localwonder
  • 6784 Answers

SOURCE: 2000 ford zx2, battery light keeps coming on/off,

There seems to be a no charge state in this case. i recommend checking the charging system. use the procedure below to isolate this issue.

Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use. (Note: never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.)

To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)

The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)

Next, you will need to check the alternators output with the Amp meter.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))

Posted on Nov 02, 2009

  • 571 Answers

SOURCE: 2006 Ford Foucs battery light. New alernator, good battery

Your fear is probably right. Get it checked before any major overhaul.

Posted on Nov 26, 2009

  • 11 Answers

SOURCE: I have a 2006 ford focus. The battery light

I have the same problem Screw napa the can't tell the differance at least not in Georgia. They said it was the battery. Anothe machanic said it's not the altornator either could be a wiring or computer problem. I think I 'll try to trade it in

Posted on Feb 10, 2010

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1 Answer

Battery light on, got new alt., starter tries to engage, but doesnt


Did you have the charging system diagnosed or did you just guess at it being the alternator . The charging system is computer controlled . The starter isn't working because low power , battery dead . Is there B+ voltage at the wire on the back of the alternator .B+ voltage at pin 3 at the connector pluged into the alternator .
Charge the battery use a volt meter an test for B+ voltage at the places i mention . No check engine light ? DTC'S - diagnostic trouble codes stored .
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No bud but a poor charging alt will throw the light have the alt checked prob need a new one

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2000 ford focus dies when coming to a stop and battery light stays on. Brand new battery and alternator just put on


Battery light on ! alternator isn't charging . Test the alternator electrical circuits .Main cable on the back of the alt. should have B+ voltage .Pin # 3 at the connector on the alt. should have B + voltage - fuse F10 10amp under hood fuse box supply's B+ to pin #3 . Pin's 1 & 2 at the connector go to the PCM - engine computer . This is a computer controlled charging system .
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try starter or your ignition relay switch or check fuses

Feb 04, 2012 | 2006 Ford Focus

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

2 Answers

My battery light has suddenly come on and the alternator has started to make a noise do i require a new one or is there something else i should be looking at.this is on a ford focus st year 2006.


My ST alternator took some time to completely fail. During the decline, I saw all kinds of random electrical issues. My advice-go ahead and replace the alternator unless you don't mind needing to tow the car (or you travel really short distances). At some point, you'll find every electrical system completely shut down (one of your computers will funnel all available battery energy to the engine and fuel pump). From that point you've got a very short distance till the battery is exhausted. This doesn't mean the battery is toast!

Having the system tested is of little value. My car-the "BATT" light was ON when it was tested, and I was told it needed a new battery. Indeed, until the very end, the voltage provided by my alt was about 14.4VDC-even with the light on.

Replace the alternator now or do it later after a tow.

Jul 29, 2010 | 2006 Ford Focus

4 Answers

I have a 2006 ford focus. The battery light


Sound like you did everything I would have check.I don't know where you got your part, but I would have gotten it at Napa.Good luck

Dec 02, 2009 | 2006 Ford Focus

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2006 Ford Foucs battery light. New alernator, good battery


Your fear is probably right. Get it checked before any major overhaul.

Nov 26, 2009 | 2006 Ford Focus

3 Answers

Battery light comes on intermittantly while driving I had the battery tested and alternator everything was fine???Is it safe??


You have an intermitt issue. Test battery voltage when light is on. More than likely alternator (also check the belt that drives it) or poor battery connection (must be clean and tight).

Nov 21, 2009 | 2006 Ford Focus

1 Answer

Car focus trend 1.6 auto 2005


You have a faulty abs censor.Have a diagnostic check done to see which one is at fault.Good luck.

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