What would make the battery light come on intermittently?

10

Asked by Jan 12, 2014 at 07:46 AM about the 2005 Mitsubishi Galant ES

Question type: Maintenance & Repair

2005 Mitsubishi Galant ES. Battery light comes on at start up then goes out after a few minutes. Mechanic tested alternator and found no problem. Battery was replaced. Symptom continued. After several weeks of driving with this condition, the car refused to start. The battery was completely drained. Mechanic tested the new battery and found it to be bad. Replaced with new second new battery. Symptoms disappeared totally for about 2 weeks. Now back to same symptoms of having the battery light come on at start up. Appreciate any troubleshooting tips.

5 Answers

10,965

Replace the altenator. The battery light is only on when the altenator is not charging your system. After starting the light should go out asap. It's not so that tells me that the altenator is weak, and once the light does go out I'm thinking it's not charging at full output, hence the new dead battery. Did the tech say what the voltage was of your charging system when it was tested. The battery should be around 11.5 to 12.5 volts and once the vehicle is running the alt. should bump your charging system up by atleast 2 volts. It is the volt differential that forces current to your battery to charge. A carbon load tester with volt reading is much better for testing batteries or charging systems but the younger techs are usually a little cautious on using them on newer vehicles.

2 of 2 people found this helpful.
Best Answer Mark helpful
116,605

I agree. If you know that the battery and all connections are good. And it starts without issue when battery is fully charged then I would replace the alternator. All because it tests good does not always mean that it is performing at peak output all the time.

1 of 1 people found this helpful.
116,605

Also have you checked your alternator belt? Is it making a squealing noise? Is its tension correct?

2 of 2 people found this helpful.
10

Thank you. New alternator installed today. So far so good.

1 of 1 people found this helpful.
116,605

Glad you got it going. Drive safe.

Your Answer

Galant

Looking for a Used Galant in your area?

CarGurus has 1,080 nationwide Galant listings starting at $2,995.

ZIP:

Mitsubishi Galant Experts

  • #1
    Tom Demyan
    Reputation
    790
  • #2
    dandyoun
    Reputation
    780
  • #3
    Daniel Foster
    Reputation
    590
View All

Related Models For Sale

Used Mitsubishi Lancer
56 Great Deals out of 5,112 listings starting at $2,450
Used Honda Accord
1,118 Great Deals out of 74,859 listings starting at $1,100
Used Toyota Camry
1,126 Great Deals out of 87,384 listings starting at $995
Used Nissan Altima
1,430 Great Deals out of 78,282 listings starting at $1,695
Used Mitsubishi Outlander
65 Great Deals out of 11,963 listings starting at $1,500
Used Mitsubishi Lancer Evolution
15 Great Deals out of 582 listings starting at $12,999
Used Mitsubishi Eclipse
11 Great Deals out of 1,134 listings starting at $1,799
Used Ford Mustang
596 Great Deals out of 39,960 listings starting at $1,895
Used Honda Civic
843 Great Deals out of 61,323 listings starting at $950
Used Chevrolet Malibu
1,127 Great Deals out of 62,898 listings starting at $880
Used Nissan Maxima
326 Great Deals out of 21,948 listings starting at $1,200
Used Ford Fusion
1,081 Great Deals out of 63,747 listings starting at $888
Used Hyundai Sonata
941 Great Deals out of 56,589 listings starting at $1,000

Used Cars For Sale

2012 Mitsubishi Galant ES For Sale
51 listings starting at $5,788
2011 Mitsubishi Galant ES For Sale
31 listings starting at $3,800
2010 Mitsubishi Galant ES For Sale
13 listings starting at $3,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.