• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Charging System

  • Thread starter Thread starter getyup68
  • Start date Start date Aug 22, 2009

getyup68

New Member
Jun 6, 2007
5
0
1
Chapel hill NC
Aug 22, 2009
#1
  • Aug 22, 2009
  • #1
Need some help on this one.I have a 68 Mustang 289, Which I installed a PA performance 3g alternator on a year ago.It has been working great until earlier this week the car crank over really slow.I check the battery and it had a bad cell, replaced it with a new one and checked the charging system.The alternator was not charging, figured it took out the battery in the process.Replaced the alternator, still not charging.Doubled and Triple checked connection also brought the alternator to advance and had them test it, tested good. Any thoughts.

Thanks, Brian
 

Tim65GT

Active Member
Feb 24, 2004
1,149
2
39
West Texas
Aug 22, 2009
#2
  • Aug 22, 2009
  • #2
Check to make sure that the "turn on" signal is goodon the Lt' Grn/Red wire. It should go through the charge lamp. If you don't have one, there should be a resistor in the circuit.

 
You must log in or register to reply here.

Similar threads

Alternator not charging
  • SchwarzStock
  • Jul 6, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
2
Views
135
1965 - 1973 Classic Mustangs -General/Talk- Jul 19, 2026
SchwarzStock
A
Resolved Electrical Help Please
  • Alabama
  • Jan 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
311
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 22, 2026
AeroCoupe
B
Electrical No charge from 3g alternator
  • BigShowJoe
  • Nov 9, 2024
  • Fox 5.0 Mustang Tech
  • 2
Replies
20
Views
1K
Fox 5.0 Mustang Tech Nov 18, 2024
Mustang5L5
Engine Random Misfire at idle.
  • Gulftown980x
  • Jul 29, 2026
  • SN95 4.6L Mustang Tech
Replies
11
Views
364
SN95 4.6L Mustang Tech Jul 31, 2026
squeak93
B
1991 3g alternator not charging
  • BigShowJoe
  • May 12, 2024
  • Fox 5.0 Mustang Tech
  • 2
Replies
23
Views
3K
Fox 5.0 Mustang Tech Mar 30, 2025
Chuckster101
C
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific 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?