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Chart A-1, No "Check Engine" Light: Notes

With ignition switch in the "ON" position and engine not running, "CHECK ENGINE" light should always be on. The ECM controls the "CHECK ENGINE" light by completing a ground circuit for the bulb.

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. An open "GAUGE" fuse could indicate a short to ground in "GAUGE" fuse circuit.
  2. This indicates a ground path through the ECM.