Dead Battery (every day)

Asked by Bill24 Oct 25, 2007 at 08:05 PM about the 2002 Ford Mustang

Question type: Maintenance & Repair

02 mustang, replaced the alternator everything fine but 2 months later battery died, replaced it no problems until morning, then each morning (2 weeks now) I have had to jump it. Autozone checked battery and said it was good. Any suggestions?

9 Answers

one autozone dont check battery under load 2 could have dead short charge battery concct pos.now with every thing turned off both doors closed,tuch neg.to neg.post and see if you see spark tutch 2or3 times if spark a dead short until found leave battery un hooked at night and while at work neg side ok.now if no spark get another alternator rember autozone or advance auto dont check under a load.

5 people found this helpful.
27,675

I would also try to find a parasitic draw (ie dome light left on, door left ajar, etc) that could be draining your battery.

8 people found this helpful.
1,075

I had same problem. Went to auto zone bought new battery because they wouldn't honor my 7 yr warrenty and it was only a yr on a gel cell.anyways new battery, dead few weeks later. Is your alarm draining it or going off to easy.if you have aaa call them.or have a battey place come out and they have a machine that hooks up under your dash and it will tell you if your alt. Is bad or where the problem is. That's what helped me.I thought it was my alt. But he said everything is fine.he didn't know what was draining mine.could be bad battery.they gave me a bad one.take it back and make sure its big enough for your car

6 people found this helpful.
9,405

Sounds like the battery isn't charging adequately,how are the battery terminals? Have they been replaced? Are they corroded? Might be time to change the terminals.....if they are fine......check for voltage drop between the alternator and battery. With car running, check voltage at the alternator, then check voltage at the battery. Have someone open and close power windows and check again. If you are seeing a 1 volt or more difference at all times you may have a faulty connection or cable..........I have had a few cars that had defective battery cables, which led to the battery not adequately charging..........

11 people found this helpful.
3,655

Here's my suggestion, 1 check to make sure the terminals are tight, it happens they get loose for what ever reason, 2 are the terminals clean, best way to make sure is to take a terminal brush to them or baking soda and water, if those don't fix it probly time for new cables but start there.

7 people found this helpful.
70

I have similar problem, but much worse. It is a 1994 Ford Mustang Convertible (Yellow). It eats alternators and batteries. It will make an alternator go from brand new to pulling (yes pulling) 2-6 AMPS in less than a year. We have been through 4 alternators (different sources) and batteries. Four service centers (two that specialize in Electrical) can find nothing wrong.. At Xmas 2019 - A brand new NAPA premium alternator and battery went from brand new to dead in two weeks and one week was sitting in the driveway. Cables good. Auto electric places find no parasitic draws. Everyone, including auto place that specailize in Mustang repair, have given up.

7 people found this helpful.
90

Check the light in the trunk, turns out my light was staying on all the time, killing the battery

9 people found this helpful.

I have an 02 and battery draw drive me nuts for months. I finally took out the trunk light bulb and problem solved.

Your Answer:

Mustang

Looking for a Used Mustang in your area?

CarGurus has 1,639 nationwide Mustang listings starting at $8,800.

Postal Code:

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    3,140
  • #2
    Bob Beaman
    Reputation
    2,680
  • #3
    rst429
    Reputation
    2,590
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Camaro
13 Great Deals out of 468 listings starting at $11,749
Used Chevrolet Corvette
31 Great Deals out of 738 listings starting at $10,989
Used Ford F-150
314 Great Deals out of 13,742 listings starting at $3,800
Used BMW 3 Series
64 Great Deals out of 1,204 listings starting at $2,500
Used Ford Mustang SVT Cobra
7 listings starting at $25,000
Used Chevrolet Silverado 1500
214 Great Deals out of 8,009 listings starting at $1,500
Used BMW M3
5 Great Deals out of 74 listings starting at $14,995
Used Honda Civic
198 Great Deals out of 4,034 listings starting at $440
Used Jeep Wrangler
128 Great Deals out of 5,963 listings starting at $6,500
Used Toyota Camry
46 Great Deals out of 1,149 listings starting at $2,500

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. Content will be removed if CarGurus becomes aware that it violates our policies.