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PCM Harness Resistance

Turn ignition switch to LOCK position. Disconnect PCM and appropriate component harness connectors. Check for open or short circuits between appropriate PCM harness connector terminal and appropriate component harness connector terminal. If harness is open or shorted, repair as necessary.

Fig 1: Identifying PCM Connector C1 Terminals (1 Of 3)
G00113350Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying PCM Connector C1 Terminals (2 Of 3)
G00113351Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying PCM Connector C1 Terminals (3 Of 3)
G00113352Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying PCM Connector C2 Terminals (1 Of 3)
G00113353Courtesy of GENERAL MOTORS CORP.
Fig 5: Identifying PCM Connector C2 Terminals (2 Of 3)
G00113354Courtesy of GENERAL MOTORS CORP.
Fig 6: Identifying PCM Connector C2 Terminals (3 Of 3)
G00113355Courtesy of GENERAL MOTORS CORP.