Park/Neutral Position Switch & Transmission Range Sensor Test
NOTE:
Following test is for Ram pickup with 4-speed transmission. All other models are equipped with a Transmission Range (TR) sensor. If TR sensor or sensor circuit is defective, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
- Place gear selector in Park. Disconnect negative battery cable. Raise and support vehicle. Disconnect Park Neutral Position (PNP) switch harness connector. Using an ohmmeter, check continuity between ground and PNP switch center terminal. See Fig 1. If continuity exists, go to next step. If continuity does not exist, replace PNP switch.
- Place gear selector in Reverse. Check continuity between ground and PNP switch center terminal. If continuity does not exist, PNP switch is okay. If continuity exists, replace PNP switch.