Power Circuits (Ignition On)

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Turn ignition on. Check for battery voltage between ECM power terminals and ground. For ECM power terminal identification, see appropriate pin voltage chart in PIN VOLTAGE CHART S article in this section. If battery voltage does not exist, check fuse. If fuse is okay, check for an open in wire or a defective ignition switch. See appropriate wiring diagram in WIRING DIAGRAMS article in this section.