FixVault
Home › Dodge and Ram › 2003 › Ram Van B2500, Van Cargo Extended, 5.2 T › Repair and Diagnosis › Engine Performance › System › Engine Controls - System & Component Testing - CNG › Computerized Engine Controls › Powertrain Control Module › Power & Ground Circuits

Power & Ground Circuits

  1. Turn ignition off. Disconnect PCM connectors. PCM is located on firewall, near wiper motor. See Fig 1 . Using a test light connected to ground, probe PCM harness connector C1 terminal No. 22 (Dark Green/Black wire). See Fig 2 . If test light illuminates, go to next step. If test light does not illuminate, repair open voltage supply circuit. See WIRING DIAGRAMS  .
  2. Turn ignition on. Using a test light connected to ground, probe PCM harness connector C1 terminals No. 2 (Light Green/Black wire). If test light illuminates, go to next step. If test light does not illuminate, repair open ignition voltage supply circuit(s). See WIRING DIAGRAMS  .
  3. Turn ignition off. Using a test light connected to battery voltage, probe PCM harness connector C1 terminals No. 31 and 32 (Black/Tan wires). If test light illuminates at both terminals, test is complete. If test light does not illuminate at one or both terminals, repair open ground circuit(s). See WIRING DIAGRAMS  .
Fig 1: Locating Powertrain Control Module
G00016658Courtesy of DAIMLERCHRYSLER CORP.
Fig 2: Identifying Powertrain Control Module Harness Connector Terminals
G00010241Courtesy of DAIMLERCHRYSLER CORPORATION
About FixVault