Pinpoint Test M: Ignition Switch Run Position Circuit Low

WARNING: This page is about a different car, the 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

M1 CHECK FOR IGNITION VOLTAGE TO THE TCM
- Disconnect: TCM C1750.
- Ignition ON.
- Measure the voltage between the TCM , C1750-33 harness side and ground.
  
  Fig 1: Measure the Voltage Between the TCM, C1750-33 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage 11 volts or greater?
- Yes: GO to M2.
- No: CHECK fuse 52, if it is OK, REPAIR the open circuit. If not OK, REFER to the wiring diagrams to diagnose the short circuit.
M2 CHECK FOR CORRECT TCM OPERATION
- Disconnect the TCM connector.
- Check for:
- Connect the TCM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new TCM . REFER to Transmission Control Module (TCM) .
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.