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Lock Cylinder & Harness Test

  1. Put ignition key into PASS-Key II(R) Interrogator (J 35628-A). Turn interrogator on. Read key code shown on interrogator display.
  2. If displayed key code is not a value of 1-15, clean and retest key. If key code is invalid, replace key. If displayed key code is a value of 1-15, record displayed key code. Turn interrogator off.
  3. Connect interrogator to 2-pin ignition switch lock cylinder harness connector at base of steering column. Put ignition key into ignition switch lock cylinder.
  4. Turn interrogator on. While checking display on interrogator, turn ignition switch slowly to START position. If displayed key code value does not match value recorded in step 2), check for poor connection. If connection is okay, replace ignition switch lock cylinder and harness.
  5. If displayed key code value matches value recorded in step 2), use a test light and front probe 2-pin connector at base of steering column between terminal "B" (White/Black wire) and battery voltage. If test light lights, check White/Black wire for an open circuit, short to voltage or short to ground. If circuit is okay, replace theft deterrent module.
  6. If test light does not light, disconnect theft deterrent module. Use a test light and probe between theft deterrent module terminal B5 (Black/White wire) and battery voltage. If test light does not light, repair open circuit in Black/White wire. If test light lights, check for poor connection at module terminals B5 (Black/White wire) or B7 (Purple/White wire), or open circuit in Purple/White wire. If connections and wiring are okay, replace theft deterrent module.
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