brown tach wire

Discussion in 'Troubleshooting & Diagnosis' started by joer, Jan 20, 2021.

  1. joer

    joer Veteran Member

    Messages:
    245
    Likes Received:
    6
    Joined:
    Sep 25, 2008
    Location:
    East Brunswick, New Jersey
    Does anybody have a pic of where the brown tach wire comes out of the fire wall. need to hook up to msd box. can't seem to find it.
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

    Messages:
    24,071
    Likes Received:
    1,589
    Joined:
    Apr 14, 1999
    Location:
    Bismarck, North Dakota
    A previous thread here on the board showed us that they didn't punch that hole in the same place on all cars. My tach wire comes through the dash over to the driver's side of the brake booster. The wire then drapes over the booster and to the center of the car to the coil. My car is a 1970.
    HPIM2039.JPG
     
  3. joer

    joer Veteran Member

    Messages:
    245
    Likes Received:
    6
    Joined:
    Sep 25, 2008
    Location:
    East Brunswick, New Jersey
    Thanks, mine is a 79. it would have snapped into the HEI distributor. It's been a while but i think the wire is much fatter with an end on it.
     
  4. DougD

    DougD Veteran Member

    Messages:
    407
    Likes Received:
    139
    Joined:
    Dec 2, 2014
    Location:
    Bradenton, FL
    Anywhere it might be, it comes out of a nipple as shown in the picture above. It's 18GA if memory serves.
     
  5. joer

    joer Veteran Member

    Messages:
    245
    Likes Received:
    6
    Joined:
    Sep 25, 2008
    Location:
    East Brunswick, New Jersey
    Ok, I'll check it. Thanks again.
     
  6. joer

    joer Veteran Member

    Messages:
    245
    Likes Received:
    6
    Joined:
    Sep 25, 2008
    Location:
    East Brunswick, New Jersey
    Would this be the tach wire. how would I hook it to my MSD box. No more after market tachs.
    tach wire.jpg
     
  7. DougD

    DougD Veteran Member

    Messages:
    407
    Likes Received:
    139
    Joined:
    Dec 2, 2014
    Location:
    Bradenton, FL
    I'm too blind to see that image :( Needs to be MUCH larger. Others can answer, I'm sure.
     
  8. joer

    joer Veteran Member

    Messages:
    245
    Likes Received:
    6
    Joined:
    Sep 25, 2008
    Location:
    East Brunswick, New Jersey
    You seem to be the only one who wanted to help. will a larger pic help.Also the pic on my valve cover. Would it be a filter from the tach?
    2 - Copy (2).jpg 1 - Copy (2).jpg
     
  9. DougD

    DougD Veteran Member

    Messages:
    407
    Likes Received:
    139
    Joined:
    Dec 2, 2014
    Location:
    Bradenton, FL
    Yes, and yes. That is the tach wire and that is the filter. For the MSD box, I can't answer, but I'd think it's available online at their site.
     
    2ndGenCrazy likes this.
  10. joer

    joer Veteran Member

    Messages:
    245
    Likes Received:
    6
    Joined:
    Sep 25, 2008
    Location:
    East Brunswick, New Jersey
    Great, Thanks again.
     

Share This Page