Power Circuits (Ignition On)

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.