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Checking PCM Power & Ground Circuits

  1. Turn ignition off. Disconnect PCM harness connectors. See Fig 1. Connect a test light between ground and fused battery voltage circuit at PCM C1 harness connector terminal. See Fig 2 or Fig 3 . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in fused battery voltage circuit.
  2. Turn ignition on. Connect a test light between ground and fused ignition switch output circuit at PCM C1 harness connector terminal. See Fig 2 or Fig 3 . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in fused ignition switch output circuit.
  3. Turn ignition off. Using a test light connected to battery positive, individually probe the ground circuits.

    If test light illuminates at each ground circuit, ground circuits are okay. Test is complete. If test light does not illuminate at each ground circuit, repair open in appropriate ground circuit.

Fig 1: Locating Powertrain Control Module
G00209198Courtesy of CHRYSLER CORP.
Fig 2: Identifying Powertrain Control Module C1 Harness Connector Terminals (2.0L)
G00228117Courtesy of CHRYSLER CORP.
Fig 3: Identifying Powertrain Control Module C1 Harness Connector Terminals (2.4L)
G00228152Courtesy of CHRYSLER CORP.
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