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Home >> Isuzu >> 1989 >> Trooper S, 2D Utility, 2.6 E, Standard >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - EFI >> Computerized Engine Controls >> Control Unit >> ECM Ignition Power Supply
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

ECM Ignition Power Supply

  1. Main relay is activated by ignition switch and supplies battery power to ECM.
  2. On Trooper II (2.6L 4-Cyl), main relay is powered through 10A or 15A fuse (No. 8) in fuse box (left side of dash). Main relay should always have power at 2 White/Blue wire terminals.
  3. On Trooper II (2.8L V6), main relay is powered through 15A fuse in fuse box (left side of dash). Main relay should always have power at 2 White wire terminals from fusible link.
NOTE: On (2.6L 4-Cyl) during cranking, battery power should be present at Yellow/Black wire of ECM 18-pin connector.
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