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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the S56 radio control multifunction switch.
  2. Test for less than 10 Ω between ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Test for 2-11.5 V between the serial data circuit terminal 3 and ground.
    • If greater than the specified range, test the serial data circuit for a short to voltage. If the circuit tests normal, replace the A22 radio controls.
    • If less than the specified range, test the serial data circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A22 radio controls.
  5. If all circuits test normal, replace the S56 radio control multifunction switch.
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