Automatic Transmission

- The [1][2]PARK/NEUTRAL switch closes when the transmission is in either the PARK or NEUTRAL positions.

- Circuit T41 splices to cavity 30 of the powertrain control module (PCM). This input tells the PCM the operator is starting the vehicle.

- Circuit T41 is spliced to circuit Z1. Circuit Z1 provides ground for the vehicle speed sensor, A/C compressor clutch, 4x4 switch, vehicle speed control, heated oxygen sensor, and PCM. The engine will not start if the vehicle loses this ground. The grounding point for the Z1 ground is the left fender side shield.