Question about 2005 Ford Mustang

1 Answer

Battery light on new battery and new alternator

I have a new battery and alternator and battery light comes on and off during driving

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.

  • Ford Master
  • 22,306 Answers

Again as in common with so many answers to questions i would to have a look but i would suggest that you check the wiring terminals on the alternator first ,Was this alternator a new genuine bosch exchange unit ? and not one from a scrapyard

Posted on Dec 31, 2012

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 Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only 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

2004 Nissan Altima 3.5L BATTERY LIGHT went on during 15 minute drive. Next day car "died" while idling after a 20 minute drive. BRAKE WARNING LIGHT & BATTERY LIGHT on prior to full electrical failure.


Start with checking the alternator voltage with a multimeter. With the car off check the voltage in the battery which should be holding 12v charged less if flat of course then start the car and test the battery again. If the alternator is good you should be getting a reading of 14 to 14.5 v if it's the alternator it'll A) not put any charge into the battery or B) be a very low voltage being anything under 13.5 v

Sep 30, 2016 | 2004 Nissan Altima

1 Answer

WHAT CAUSES BATTERY TO COME ON WHILE IDLING, GOES OFF WHEN DRIVING? JUST PUT A NEW BATTERY IN IT


The battery light does not mean the battery is bad. The battery is there only to start the vehicle. Once running, the alternator supplies the power to operate the car and recharge the power lost by the battery during the starting process. Anytime the vehicle draws more power than the alternator is producing, the battery light will come on. In most cases, this indicates a faulty alternator, but there could be other electrical issues that can cause the problem. Have the charging system tested to ensure that it is working okay. If you don't, you will discharge the new battery. Since you say it is only happening at idle, it is possible that the serpentine belt may be glazed and slipping, or that your belt tensioner may be weak and faulty. The belt drives the alternator and if it is slipping, that will reduce alternator output.

Feb 29, 2016 | 2003 Ford F-150

1 Answer

Battery light comes on while driving. Immediately after water pump/timing belt replacement. Replaced battery and alternator tests good. Intermittent battery light remains?


It sounds as though the belt may be slipping or is not tight enough?

If it's a toothed belt it won't slip - it may not be tensioned enough where it goes around the alternator pulley. They are adjustable.

A smooth non-toothed belt can slip.

Also, check the tightness of the battery leads where they connect to the battery and to the earth - on the bodywork/engine block

Jan 19, 2016 | 1999 Lexus Gs 300

1 Answer

04 buick rainier, charge light goes off during high rpms


have the alternator bench tested for problem in regulator or rectifier. check and adjust the drive belt. Charge light should go off at at idle and remain off during whole of engine operation
if they come on at idle it means that the alternator is not producing a charge current and needs attention.

Feb 11, 2015 | 2004 Buick Rainier

1 Answer

Battery light come on when driving and then goes off


When the battery light comes on it is telling you that there is a problem in the charging system. Have the charging system checked by a mechanic. Most likely the alternator is starting to fail.

Aug 15, 2014 | 2003 Ford Focus

1 Answer

Just replaced battery but battery light comes on goes off comes back on


The warning light is telling the driver the alternator is not charging the battery. The alternator and wiring would need to be checked.

Jan 29, 2014 | 2003 Buick Regal

1 Answer

89 Honda Accord Battery Light is On


The FuseLink is blown. It is a 100 AMP in-line fuse on the red wire from the alternator.

Oct 05, 2009 | 1989 Honda Accord 4 Door

1 Answer

Kia Sorento Warning Lights


1. Are your alternator belt lose???
2. Sound like your alternator is not putting enough amp out at idle. Have someone check your alternator out.

Jan 30, 2009 | 2004 Kia Optima

Not finding what you are looking for?
2005 Ford Mustang Logo

75 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

fordexpert

Level 3 Expert

5613 Answers

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

Answer questions

Manuals & User Guides

Loading...