Checking the wiring

Fig 1: Identifying Ignition OFF

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Fig 2: Identifying Connectors

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Fig 3: Identifying Control Module Disconnected

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• Ignition off
• Connect the breakout box
• Disconnect the control module.
• Disconnect the transmission connector
• Connect adapter 9511505 and breakout box 9813190 to the transmission connector (transmission side).

  Check the cable between control module terminal #50 (#A50) and transmission connector terminal #A (#A1). Check for a short-circuit to supply voltage.

  Check the cable between control module terminal #53 (#A53) and transmission connector terminal #E (#A5) (control module side). Check for a short-circuit to supply voltage.

  HINT: Also check all the other power supply cables in the circuit. 

  Remedy as necessary.

  Other information: 

  • To connect the breakout box to the control module, see Connecting the breakout box
  • To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions
  • For information about signals, see Signal specification
  • See Checking wiring and terminals
  Fig 4: Identifying Breakout Box

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  Fig 5: Identifying Voltage Display

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Was a fault detected? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the control module