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charging system

  1. Alternator undercharging

    Classic Tech
    Hi all, 66 coupe, 289 auto I'm having this problem with my charging system where at idle the battery sits around 12.5 volts, but if I rev the engine it will increase to the expected ~14.4 volts. The problem is when the car gets hot enough and my electric fan kicks on, the idle gets choppy. I'm...
  2. Charging System Issue

    Classic Tech
    I am having an issue with the charging system in my '67 (302 - engine is from a '68). Brief History: -The car sat for a number of years ... just over a year ago we had a lot fixed, including a new alternator, battery, and voltage regulator. -I have been driving it almost every day for the past...
  3. 1989 mustang lx charging system problems.

    5.0L Tech
    1989 mustang lx charging system problems. Please help I've replaced the alternator and tested all fusible links for voltage and all seems fine. Can the battery indicator on cluster be my problem? It did work at one point but recently stopped illuminating. Please give me some help.
  4. 1966 coup dies when headlights are turned on

    Classic Tech
    Hello, My names Jordan. I've got a 1966 mustang with a 302 and c4 transmission. Recently, I put in a 1 wire 150 amp alternator. The alternator's functional, When I increase throttle the volts go up and I've been using this alternator in another vehicle prior. The issue i'm having is when I turn...
  5. 05 Mustang Charging Problem

    2005-2010 Mustang GT Tech
    I have a 2005 Mustang V6 and I am having big problems with the charging system. I think. Started a few months ago and it would not start. Replaced the battery and it did it again a week later. Had it tested and they told me the alternator was bad. (this one was replaced by Ford a couple years...
  6. 1984 mustang 3g altenator swap. what alternator should I use? I need cheap.

    5.0L Tech
    My 1984 mustang 5.0 carbed HO convertible won't charge. The alternator tests good. I've tried two that have been both verifies as good. I've changed the regulator three times and none worked. All the wires I test have continuity. It charges when I full field it. but I don't want to run it like...
  7. 2006 Mustang Check Charging System Light

    2005-2010 V6 Mustang Tech
    So I have been having alot of trouble with my 06 Mustang V6 check charging system light coming on. recently I have noticed that when I start my car there is no light and after about 9 or 10 mins of driving the light comes on. I have read that the shaker 500 radio could be causing the problem but...
  8. 1984 Mustang GLX won't charge. Wiring problem.

    5.0L Tech
    I have a 1984 Mustang GLX, 5.0 HO carbed, 5 speed convertible. I can't get it to charge the battery. It has an externally regulated alternator. When I disconnect the clip from the regulator and full field it by jumping A and F, it charges at 14.x. The field wire has continuity to ground. The A...
  9. 2005 Mustang Charging System Issues.

    2005-2010 V6 Mustang Tech
    My car one day had the white odometer lights dim with I hit the brake pedal, and then after I parked it would turn back on. I left it alone and went into work and came back after i got off 4 hours later and it started. I didnt make it quite to my house and everything turned off. First my radio...
  10. 1968 mustang charging issues

    Classic Tech
    I have a 1968 mustang with a 289 and the battery wont stay charged. I have looked up wiring diagrams for the altanator but in my car someone who owned it before me had changed the actuall wires. This is making it complicated cause i dont know where what wire goes. I know i have the one for the...
  11. One Wire Alternator Doesnt Charge w/ Accessories

    Classic Tech
    Greetings! I have a 1966 GT 289/302. When purchased it had a three wire alternator. I have subsequently replaced said alternator with a PowerMaster 140 amp one wire, which is internally regulated. Since it is internally regulated I have removed the external voltage regulator used by the prior...
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