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Converter Lock-Up Signal From PCM

  1. Warm engine to operating temperature. Raise vehicle and support drive wheels. Support suspension where necessary to prevent damage to drive axles.
  2. Connect a test light to battery voltage. Touch TCC solenoid terminal at PCM with test light. Accelerate vehicle to 45 MPH and note test light. If test light does not illuminate, problem is a faulty PCM connector or PCM.
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