90 mustang gt brake light help needed

Discussion in 'Other Automotive Tech & Talk' started by shaunh82, Mar 11, 2007.

  1. shaunh82

    shaunh82 Member

    Joined:
    Apr 3, 2004
    Messages:
    934
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    Washington NJ
    Vehicle:
    71 Pinto sportsroof
    my buddy has a mustang, and all of a sudden, he started popping fuses left and right for his brakes. we tried tracing the circuit, but can't find anything obviously wrong. replaced the light switch, still shorting somewhere. anyone know if there's a component prone to going bad in these things or something? Also, his uncle gave him a thermal breaker as kind of a temp fix for the brake light circuit, but that ended up frying his MSD box, where abouts are these things hooked into the same wiring? I'm completely lost on this one:hmmm:
    Thanks
    Shaun
     
  2. 74bossmav

    74bossmav Member

    Joined:
    Jan 24, 2006
    Messages:
    71
    Likes Received:
    0
    Trophy Points:
    23
    Location:
    Illinois Machesney Park
    Vehicle:
    1974 Maverick 2 door Brn.
    Just keep in mind that with DC current in a car, the whole metal structure of the car is part of the electrical circuit. This could somewhat explain how the ignition got involved. This is part of the reason why tracking down electrical problems can be so confusing and frustrating and why electrical problems can be so expensive to get fixed at a shop. I don't know what is wrong with the brake light system on the car but maybe it will help you understand what is going on a little more.
     
  3. Rick Book

    Rick Book Member

    Joined:
    Mar 9, 2002
    Messages:
    5,744
    Likes Received:
    13
    Trophy Points:
    197
    Location:
    Thailand
    Vehicle:
    Missing my old '70 Maverick
  4. shaunh82

    shaunh82 Member

    Joined:
    Apr 3, 2004
    Messages:
    934
    Likes Received:
    2
    Trophy Points:
    0
    Location:
    Washington NJ
    Vehicle:
    71 Pinto sportsroof
    yeah, it's a hatch, I'll pass the info to my buddy, hopefully he can figure this stupid thing out this week
    Thanks guys
    Shaun
     
  5. Andysutt

    Andysutt '72 Comet GT

    Joined:
    Dec 30, 2002
    Messages:
    3,086
    Likes Received:
    3
    Trophy Points:
    112
    Location:
    Conway Arkansas
    Vehicle:
    1972 Comet GT
    Im not sure but check out foureyedpride.com they can prob help you there
     

Share This Page