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Wiring Woes! Please Help!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by robbie, Jun 8, 2001.

  1. robbie

    robbie Registered Member

    Jun 8, 2001
    Likes Received:
    Hi guys,

    I took the EFI off my '87 Blazer, bought a new (used) engine bay wiring harness from a mid-80's Chevy pickup, and am now confused.

    Has anyone got a wiring diagram for the firewall "block" that the wiring harness plugs into? I could figure things out from there. My Hastings book doesn't contain that diagram. Figure that'd be easier than saying "this connector is for this, this color wire is for that".

    Also, I'm left with 4 wires under the dash after removing the EFI, I think they went to the connector for the diagnostic tool. 2 dark/black wire, a brown with a black stripe, and an orange with a stripe. Figured out the orange - used for the trans in a starting position or not, not sure about the others. Anyone?

    Help please!


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