distributer-coil wiring 85 s10 blazer help

Discussion in '1983-2005 S-Series models' started by jay_frank, May 26, 2003.

  1. jay_frank

    jay_frank New Member

    May 26, 2003
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    Apparently, the 85 blazer distributer and coil are very unique and not shared with other model years. mine has a vacuum advance, ignition module in the distrib and no ECU.

    After an engine swap, my wires are messed up. Trying to trace it is proving difficult as the only reference i have is a haynes. Every wire diagram in the haynes shows an ECU.

    The problem is no spark. Out of two known running engines (one was banging like mad) with two known good distributers I doubt both ignition modules decided it was time to fail simultaneously. I did swap the two I had, but figure going out to buy another is a waste of time.

    So, I am trying to figure out what is disconnected. On one side of the coil is a wire that goes to the distributer and it plugs into the ignition module. The other side has two wires, one of which measures 12V to ground. I am not sure of the other wire, where it goes or if it is supposed to be grounded.

    Any help or reference to a wireing diagram specific to the 85 would be helpful.
  2. azblazor

    azblazor Well-Known Member Premium Member

    May 5, 2001
    Likes Received:
    Arizona, Phoenix area
    My son has an 85 S-10 and we have the factory manual I think. What did you do during the "engine Swap"? Do you have the 2.8 liter V6?

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