Ford E6TZ-7A247-A Switch - Neutral Sensing

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With the automatic transmission linkage properly adjusted, loosen the two Neutral Safety Switch retaining bolts. Place the transmission selector lever in Neutral. Rotate the switch and insert a No. 43 drill bit (shank end) into the gauge pin holes of the switch. The drill shank must be inserted a full 31/64 inch through all three holes of the switch. Tighten the switch retaining bolts securely, then remove the drill bit from the switch. Check the operation of the switch. The back-up lights should come on only when the transmission is in Reverse and the engine should start only with the transmission lever in Park and Neutral.

The Neutral safety switch is designed to prevent accidental engine starting while the vehicle is in gear. It interrupts the Start circuit between the ignition key and the starter relay. Manual transmission switches are closed by the clutch pedal assembly when the clutch is fully depressed. Automatic transmission switches are closed by the shift selector lever when it is in the PARK or NEUTRAL position. There are two types of manual switches: clutch pedal mounted (early models) and clutch master cylinder mounted (later models). There are three types of automatic transmission switches: one for the E40D transmission, another for the C-series transmissions, and a third for the AOD transmission. The AOD switch is non-adjustable, as is the later model manual switch. All other switch adjustments are documented. For manual transmission early models, the switch can be located on the clutch pedal. Disconnect the electrical connector and check for voltage while holding the key in the START position. If no voltage is indicated, repair the harness and check the starter. If voltage is indicated, jumper between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace and adjust the switch. For manual transmission later models, locate the switch on the clutch master cylinder actuator shaft. Disconnect the electrical connector and check for voltage while holding the key in the START position. If no voltage is indicated, repair the harness and check the starter. If voltage is indicated, jumper between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace the switch. For automatic transmission C-Series and E40D transmissions, raise the vehicle and locate the PARK/NEUTRAL position switch on the driver's side of the transmission. Disconnect the electrical connector and check for voltage while holding the key in the START position. If no voltage is indicated, repair the harness and check the starter. If voltage is indicated, jumper between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace and adjust the switch. For AOD transmission, raise the vehicle and locate the switch on the driver's side of the transmission above the selector lever. Disconnect the electrical connector and check for voltage while holding the key in the START position. If no voltage is indicated, service the harness and check the starter. If voltage is indicated, jumper between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace the switch.

To raise the vehicle and support it securely on jackstands. Check the manual shift linkage. Place the transmission in the Neutral position. Loosen the two MLPS retaining bolts. Using the MLPS adjusting tool, position MLPS and tighten the retaining bolts securely. Remove the jackstands and lower the vehicle.

For manual transmission early models, the switch can be located on the clutch pedal. Disconnect the electrical connector and check for voltage while holding the key in the START position. If no voltage is indicated, repair the harness and check the starter. If voltage is indicated, jumper between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace and adjust the switch.

The Transmission Range (TR) sensor is mounted on the automatic transmission and senses the position of the gear selector as chosen by the driver. The TR sensor contains a series of resistors and switch contacts. Depending on the gear selector position, the sensor contacts route current through different combinations of resistors and produce voltage signals of different levels. The sensor sends these signals to the PCM, which uses them for a number of engine and transmission control operations. The TR sensor input affects operation of the EGA system, idle speed control, and transaxle torque converter lockup. The sensor also takes the place of the neutral safety switch used on older automatic transmissions. If the gear selector is not in Park or Neutral, the TR sensor will not let the starter motor operate. The Electronic Engine Control (EEC) system can detect sensor problems and set trouble codes to indicate specific faults. For the check and replacement procedures.

The automatic transmission linkage should be properly adjusted.

Place the shift lever inside the vehicle in the NEUTRAL ("N") position. This is important for the proper alignment of the DTR sensor.