/ Register

Brown Exciter wire on voltage regulator

Discussion in 'Troubleshooting & Diagnosis' started by Bowtie Performance, Dec 31, 2016.

Tags:
  1. Dec 31, 2016 #1
    Bowtie Performance

    Bowtie Performance New Member

    Messages:
    4
    Likes Received:
    0
    Joined:
    Dec 30, 2016
    So I'm finally starting to get to the bottom of my alternator not charging the battery. I purchased a new alternator with an internal regulator. I then made the connections to remove the voltage regulator (blue to brown and yellow to orange). Still the alternator was not charging the battery. Finally, I traced the brown wire, which used to go to the regulator, inside the car and found that it did not lead anywhere and was just open hot lead. My understanding, from wiring diagrams, is that the brown wire needs to be hooked up to the ignition switch. Getting to the ignition switch seems like a difficult task. Could I just connect it to an ign post on the fuse box?
     
  2. Dec 31, 2016 #2
    bourbon_scotch

    bourbon_scotch Veteran Member Lifetime Gold Member

    Messages:
    2,748
    Likes Received:
    244
    Joined:
    Jan 10, 2003
    Location:
    USA
    Not sure but i think that brown might go to the alt. light
     
  3. Dec 31, 2016 #3
    Bowtie Performance

    Bowtie Performance New Member

    Messages:
    4
    Likes Received:
    0
    Joined:
    Dec 30, 2016
    I think it goes to the light and then the ignition switch. Maybe not...
     
  4. Dec 31, 2016 #4
    Gary S

    Gary S Administrator Lifetime Gold Member

    Messages:
    23,866
    Likes Received:
    1,479
    Joined:
    Apr 14, 1999
    Location:
    Bismarck, North Dakota
    The light (if you have an idiot light) acts as a current limiter for the brown wire sense circuit. It has power only with the ignition on. On vehicles with no idiot light (gauges), there should be a resistor in the line to act as the current limiter. Full 12v without a current limiting resistance sets you up to possibly damage the sense circuit with too much current flow.
     

Share This Page