Pinpoint Test B: The Engine Does Not Crank And The Relay Does Not Click

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK CIRCUIT 1093 (TN/RD) FOR VOLTAGE
- Disconnect: Starter Motor Relay.
- Key in START position.
- Measure the voltage between the starter motor relay pin 86, circuit 1093 (TN/RD) and ground while holding the key in the START position.
  
  Fig 1: Measuring Voltage Between Relay Pin 86 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B7.
- No : GO to B2.
B2 CHECK CIRCUIT 325 (DB/OG) FOR VOLTAGE AT THE DIGITAL TR SENSOR
- Key in OFF position.
- Disconnect: Digital TR Sensor C167.
- Key in START position.
- Measure the voltage between the digital TR sensor C167 pin 10, circuit 33 (W/PK) and ground while holding the key in the START position.
  
  Fig 2: Checking Circuit 325 (DB/OG) For Voltage At Digital TR Sensor
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B3.
- No : GO to B5.
B3 CHECK CIRCUIT 1093 (TN/RD) FOR OPEN
- Key in OFF position.
- Measure the resistance between the digital TR sensor C167 pin 12, circuit 1093 (TN/RD) and the starter motor relay pin 86, circuit 1093 (TN/RD).
  
  Fig 3: Checking Circuit 1093 (TN/RD) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to B4.
- No : REPAIR circuit 1093 (TN/RD). TEST the system for normal operation.
B4 CHECK DIGITAL TRANSMISSION RANGE (TR) SENSOR ADJUSTMENT
- Carry out the digital TR sensor adjustment. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION - TORQSHIFT .
- Is the digital TR sensor adjusted correctly?
- Yes : INSTALL a new digital TR sensor. TEST the system for normal operation.
- No : ADJUST the digital TR as necessary. TEST the system for normal operation.
B5 CHECK CIRCUIT 1050 (LG/P) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Ignition Switch C250.
- Key in ON position.
- Measure the voltage between the ignition switch connector C250 pin 4, circuit 1050 (LG/P) and ground.
  
  Fig 4: Checking Circuit 1050 (LG/P) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B6.
- No : REPAIR circuit 1050 (LG/P). TEST the system for normal operation.
B6 CHECK THE IGNITION SWITCH
- Carry out the ignition switch component test. Refer to COMPONENT TESTING - F250-F550 SUPER DUTY PICK .
- Does the ignition switch test good?
- Yes : REPAIR circuit 32 (RD/LB)/33 (W/PK). TEST the system for normal operation.
- No : INSTALL a new ignition switch. TEST the system for normal operation.
B7 CHECK THE RELAY GROUND CIRCUIT FOR AN OPEN
- Measure the voltage between the starter motor relay pin 85, circuit 325 (DB/OG) and pin 86, circuit 1093 (TN/RD).
  
  Fig 5: Checking Relay Ground Circuit For An Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new starter motor relay. TEST the system for normal operation.
- No : GO to B8.
B8 CHECK CIRCUIT 325 (DB/OG) FOR AN OPEN
- Key in OFF position.
- Disconnect: PCM C175e.
- Measure the resistance between the PCM C175e pin 34, circuit 325 (DB/OG) and the starter motor relay pin 85, circuit 325 (DB/OG).
  
  Fig 6: Checking Circuit 325 (DB/OG) For An Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new starter motor relay. TEST the system for normal operation.
- No : REPAIR circuit 325 (DB/OG) for an open. TEST the system for normal operation.