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Door Lock Relay Assembly Test

  1. Ensure door lock relay assembly connector is connected. Backprobe door lock relay connector and measure voltage between terminal "C" (Orange wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, check rear fuse block PWR DR LK fuse. Also check Orange wire for an open or short to ground.
  2. Backprobe door lock relay assembly connector between terminals "C" and "D" (Black wire). If battery voltage is present, go to next step. If less than battery voltage is present, check Black wire for an open circuit.
  3. Backprobe door lock relay assembly connector between terminals "A" (Light Blue wire) and "D" (Black wire). If battery voltage is present, go to next step. If less than battery voltage is present, check Light Blue wire for an open or short circuit to ground. Also check door lock switch connector for good terminal contact. If both are okay, replace left front door lock switch.
  4. Backprobe door lock relay assembly connector between terminals "F" (White wire) and "D" (Black wire). Hold door lock switch in unlock position. If battery voltage is present, go to next step. If less than battery voltage is present, check White wire for an open circuit or short to ground. Also check front door lock switch connector for good terminal contact. If both are okay, replace left front door lock switch.
  5. Backprobe door lock relay assembly connector between terminals "B" (Gray wire) and "E" (Tan wire). Move left door lock switch to lock and unlock positions. If battery voltage is present for both switch positions, go to next step. If less than battery voltage is present for one or both switch positions, check Gray and Tan wires to door lock motors for a short to ground. Also check door lock relay assembly connector for good terminal contact. If both are okay, replace door lock relay assembly.
  6. If battery voltage was present for both switch positions, check Gray and Tan wires to door lock motors for an open circuit. Also check door lock motor connections for good terminal contact. If both are okay, replace door lock motor.
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