Ford FOVY-7A247-A Switch - Neutral Sensing

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The Transmission Range (TR) sensor is located at the manual lever on the transmission and serves as an information sensor for the powertrain control module (PCM). It performs functions similar to a Park/Neutral switch, such as preventing the engine from starting in any gear other than Park or Neutral and activating the back-up lights when the shift lever is in Reverse. The TR sensor also includes the sensing circuit for Neutral in 4X4 Low range on 4WD models. If the engine starts in a position other than Park or Neutral, the TR sensor may be out of adjustment or defective. To check its functionality, deactivate the air suspension system if equipped, raise and secure the vehicle on jackstands, and turn the ignition switch to On while shifting into Reverse to verify if the back-up lights come on. If they do not, detach the shift cable, loosen the sensor retaining bolts, and adjust the sensor until the back-up lights illuminate. Then, tighten the sensor retaining bolts, reattach the shift cable, and lower the vehicle. If the back-up lights still do not come on, check the back-up lights and circuit for any issues. To replace the TR sensor, deactivate the air suspension system if applicable, raise the vehicle and secure it on jackstands, unplug the electrical connector from the sensor, detach the shift cable, remove the manual lever if necessary, and then remove the sensor by taking out the retaining bolts. Install the new sensor by following the reverse of the removal process, ensuring proper adjustment and securely tightening the retaining screws. Finally, remove the jackstands and lower the vehicle, and reactivate the air suspension system if applicable.

To check the operation of the neutral safety switch, apply the parking brake and try to start the engine in each position of the selector lever. The engine should start only in Park and Neutral. If it starts in any other position, adjust the shift linkage and retest. If the engine still starts in any position other than Park or Neutral, replace the switch. To replace the switch, disconnect the cable from the negative battery terminal, place the shift lever in Low and apply the parking brake. Raise the vehicle and place it securely on jackstands. Unplug the electrical connector from the neutral safety switch. Carefully unscrew the switch and O-ring. Install the switch and new O-ring, tightening it to the specified torque. Be cautious not to crush or puncture the walls of the switch. Install the electrical connector and connect the negative battery cable. Verify that the engine starts only when the selector is in the Neutral and Park positions. The AODE transmission used on 1992 through 1994 models does not have a neutral safety switch. That function has been incorporated into an information sensor known as the Manual Lever Position (MLP) sensor. And 1995 and later models, which are equipped with a 4R70W transmission, use a transmission range (TR) sensor, a similar device.