• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

battery light?

  • Thread starter Thread starter 96GT281
  • Start date Start date Apr 27, 2008

96GT281

New Member
Apr 12, 2008
0
0
0
Stuart, Fl
Apr 27, 2008
#1
  • Apr 27, 2008
  • #1
well when i bought my car it had a new altenator in it but whenever i brang the rpm's past 4 grand the volt gauge would peg to 18 and the battery light would come on, so today i bought a new voltage regulator and now its sayin the volts are too low and the battery light comes on but i checked the battery and it was 12.6v and the alt output was 12.3v.
 

Superhereaux

chicks make me feel inadequate
Founding Member
Jul 30, 2002
538
3
59
South Texas
Apr 27, 2008
#2
  • Apr 27, 2008
  • #2
check all the connections (including all grounds) at the battery and alternator and make sure they're properly tightened


the previous overcharging may have damaged the alternator and possibly the battery. is it an OEM piece?
 

96GT281

New Member
Apr 12, 2008
0
0
0
Stuart, Fl
Apr 27, 2008
#3
  • Apr 27, 2008
  • #3
yea its motorcraft but the connections are good
 

Superhereaux

chicks make me feel inadequate
Founding Member
Jul 30, 2002
538
3
59
South Texas
Apr 27, 2008
#4
  • Apr 27, 2008
  • #4
the charging system is a difficult thing to diagnose without the proper equipment

easiest thing to do would be drive the car to an Autozone, remove the alt. and have them test it. since the car is there have them test the battery too
 

96GT281

New Member
Apr 12, 2008
0
0
0
Stuart, Fl
Apr 27, 2008
#5
  • Apr 27, 2008
  • #5
i did that..... it passed all tests, but any time i would bring it over 4k the volt gauge would peg to 18v and the headlights would get so bright
 
You must log in or register to reply here.

Similar threads

P
Electrical 2001 GT Overcharging
  • PseudoGT
  • Dec 3, 2025
  • SN95 4.6L Mustang Tech
Replies
1
Views
348
SN95 4.6L Mustang Tech Dec 13, 2025
Noobz347
E
2007 GT Stalls when lights or a/c turned on
  • ejscarfo
  • Jun 22, 2026
  • 2005 - 2009 Specific Tech
Replies
3
Views
336
2005 - 2009 Specific Tech Sep 26, 2026
manicmechanic007
Alternator not charging
  • SchwarzStock
  • Jul 6, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
3
Views
248
1965 - 1973 Classic Mustangs -General/Talk- Oct 17, 2026
SchwarzStock
K
Engine 2000 Mustang GT - Fuel issue post-blown spark plug repair
  • kenster1092
  • Feb 26, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
569
SN95 4.6L Mustang Tech Mar 10, 2026
kenster1092
K
A
Resolved Electrical Help Please
  • Alabama
  • Jan 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
361
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 22, 2026
AeroCoupe
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?