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Home >> Isuzu >> 1989 >> Pickup 1 Ton, MSG5E >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - EFI >> Computerized Engine Controls >> Control Unit >> ECM Constant Power Circuits
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ECM Constant Power Circuits

  1. ECM should always have battery power to retain memory. On Amigo, check Gray wire on 14-pin connector that is pwered by No. 8 fuse in fuse box (under left side of dash).
  2. On Pickup, check ECM Green/Yellow wire of 14-pin connector. Power is from 10 amp fuse (No. 3) in fuse box.