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Home >> Isuzu >> 1989 >> Impulse 2.3 L, Standard >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - EFI >> Computerized Engine Controls >> Control Unit >> ECM Ignition Power Supply
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ECM Ignition Power Supply

Main relay is activated by ignition switch and supplies battery power to ECM. Main relay is powered through Brown fusible link wire (near battery). Main relay should always have power at 2 White/Blue wires. Power is from Green fusible link wire near battery.

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