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Thread: 1227747 IAC wiring to IAC for Big Block and Small Block

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    RIP EagleMark's Avatar
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    1227747 IAC wiring to IAC for Big Block and Small Block

    Here's one that drives people nuts. SB and BB IAC are wired differently.

    Wiring:
    SBC Connector
    IAC Plug
    A ~11.86 v Lt Blue/White Stripe A Hi
    B ~.452 v Lt Blue/Black Stripe A Low
    C ~11.86 v Green/White Stripe B Hi
    D ~.453 v Green/Black Stripe B Low

    BBC Connector
    IAC Plug
    A ~452 v Green/Black Stripe B Low
    B ~11.84 v Green/White Stripe B Hi
    C ~.452 v Lt Blue/Black Stripe A Low
    D ~11.84 v Lt Blue/White Stripe A Hi
    Attached Images Attached Images

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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