battery light - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 10-08-2012, 06:08 PM   #1
Registered Member
Regular
 
edross's Avatar
 
Join Date: Jan 2005
Region: Georgia
Posts: 213
battery light

battery light comes on and goes off, had advance auto use a scanner and they did not find anything wrong, any ideas on what to look for?
__________________
2003 gt, sct custom tuned by VMP, k&n fipk, upr o/r x-pipe, dynomax turbo mufflers, mm c/c plates, mm full length subframe connectors, h&r race springs, bullit rims 18x10 rear 18x9 front, 4.10 gears, 20% tint, 9 inch shorty antenna
edross is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-08-2012, 06:43 PM   #2
Legacy Member
Legacy
 
lowflyn's Avatar
 
Join Date: Aug 2003
Region: Mississippi
Posts: 19,890
Send a message via AIM to lowflyn
Bad ground. If not it's your alternator
__________________
"I'm not driving too fast...just flying too low"
Mine:
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
Our's:
90 7up vert - new project-07 DSG Focus -DD
335
lowflyn is offline   Reply With Quote
Old 10-08-2012, 08:54 PM   #3
Registered Member
Regular
 
maldog's Avatar
 
Join Date: Jun 2012
Region: Nevada
Posts: 1,563
Do the old trick and remove the neg side battery with the car running. If the engine dies you have a alternator problem. If it stays running u could have a ground problem or battery problem.
__________________
2006 Mustang GT Premium RedFire. CAI, SLP Loudmouth, SCT Progammer, 5 speed manual trans. My other car is a CORVETTE!
maldog is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-08-2012, 10:44 PM   #4
Registered Member
Regular
 
Bleem@1's Avatar
 
Join Date: Oct 2012
Location: Amarillo
Region: Texas
Posts: 65
There is a diode problem with the alternators. However if you're gauge does not drop it is more likely a battery or battery cable/terminal issue. If you're battery is just say 100 cranking amps low the light will flicker off and on randomly.
Bleem@1 is offline   Reply With Quote
Old 10-09-2012, 12:07 AM   #5
Registered Member
Regular
 
Join Date: Jan 2011
Region: Arkansas
Posts: 704
Mine does it too.
I replaced the terminal cables and got no difference.
Definitely do the negative terminal disconnect and see what happens.
If the car starts reliably, you're probably fine.
Mine's been doing it for a while and I just gave up and deal with it.
If you can, grab a buddy's battery for a day and see if the light flickers still, if it does then you likely have a bad ground.
BackPressure is offline   Reply With Quote
Old 10-09-2012, 05:52 AM   #6
Registered Member
Regular
 
edross's Avatar
 
Join Date: Jan 2005
Region: Georgia
Posts: 213
i bought the battery last year and still have the original alternator with 98,000 miles on it, going to clean terminals and check for loose connections this afternoon, if that doesent fix it i will get an alternator this weekend, thanks for the replies
__________________
2003 gt, sct custom tuned by VMP, k&n fipk, upr o/r x-pipe, dynomax turbo mufflers, mm c/c plates, mm full length subframe connectors, h&r race springs, bullit rims 18x10 rear 18x9 front, 4.10 gears, 20% tint, 9 inch shorty antenna
edross is offline   Reply With Quote
Old 10-09-2012, 06:54 AM   #7
Registered Member
Regular
 
Bleem@1's Avatar
 
Join Date: Oct 2012
Location: Amarillo
Region: Texas
Posts: 65
Mine was doing it. 04 GT vert. While I was install a stereo we redid my terminals and did a ten amp charge for two hours. It has been off for almost a week now with more load on the alt. my alt and battery passes load test. Battery showed about 90 cranking amps low. Never slow cranked or anything. I really think it is either the battery or was the batt connections. Car has 100000 miles. Good luck with yours.
Bleem@1 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



05:40 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.