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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the reading lamp switch.
  2. Test for less than 1.0 Ω of resistance between the ON circuit and ground.
    • If greater than 1.0 Ω, test the ON circuit for an open/high resistance.
  3. Install a test lamp between the signal circuit and ground. Verify the test lamp turns ON.
    • If the test lamp does not turn ON, test the signal circuit of the reading lamp switch for a short to ground or an open/high resistance.
  4. If all circuits test normal, test or replace the reading lamp assembly or the reading lamp bulb.
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