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Hot Rods HELP...WIRING GURUES

Discussion in 'The Hokey Ass Message Board' started by HAGY39, Jul 18, 2021.

  1. HAGY39
    Joined: Oct 23, 2016
    Posts: 108

    HAGY39

    HAVE A MSD8389 3 WIRE DIST. SUN TAC CUT WIRES TO TAC...WILL NOT RUN, BOTH WIRES HOT AT COIL AND TAC 12V/ SIGNAL WIRES HOT? WHATS GOING ON ? 309-373-3649
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 60,070

    squirrel
    Member

    this is how it is supposed to be wired. Did you do anything different from this?, which might have burned out the ignition module in the distributor?

    dist.jpg
     
    loudbang, Budget36 and olscrounger like this.
  3. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,067

    Mr48chev
    ALLIANCE MEMBER

    The instructions are pretty straight forward 8389.pdf (holley.com)
    One thing that comes to mind is that some ignition switches don't have power to the coil when you are cranking the engine relying on a resistor byp*** for 12 V to the coil while cranking.
    Have you checked for power to the coil while cranking?

    Other than that some modules are more delicate than others even in 600 buck distributors.
     
  4. HAGY39
    Joined: Oct 23, 2016
    Posts: 108

    HAGY39

    Thanks....had other problem.....
     
    squirrel likes this.
  5. HAGY39
    Joined: Oct 23, 2016
    Posts: 108

    HAGY39

     
  6. HAGY39
    Joined: Oct 23, 2016
    Posts: 108

    HAGY39

    Thanks had other problem......
     
  7. Which was......?
     
    VANDENPLAS likes this.

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