Pinpoint Test

1. Ignition OFF.
2. Disconnect the scan tool cable from the DLC.
3. Inspect DLC pins 4, 5 and 16 for damage.
   Fig 1: Locating DLC Pins 4, 5 And 16 For Damage

   Courtesy of FORD MOTOR CO.

Are DLC pins 4, 5 and 16 OK? 

1. Yes: GO to 2  .
2. No: REPAIR the DLC as necessary.

1. Measure:

DLC			Ground
C251			Chassis Ground
Pin	Circuit	Measurement	Pin	Circuit
16	SBP24 (VT/RD)		-	-

Is the voltage greater than 11 volts? 

1. Yes: GO to 3  .
2. No: VERIFY the BCM fuse 24 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the appropriate wiring diagrams to identify the possible causes of the circuit short. REFER to OEM FUSE AND RELAY INFORMATION and OEM WIRING DIAGRAMS .

1. Disconnect: Negative Battery Cable.
2. Measure:

   DLC			Ground
   C251			Chassis Ground
   Pin	Circuit	Measurement	Pin	Circuit
   4	GD214 (BK/BU)		-	-
   5	GD214 (BK/BU)		-	-

Are the resistances less than 3 ohms? 

1. Yes: REPAIR the scan tool. CONNECT the negative battery cable.
2. No: REPAIR the circuit in question. CONNECT the negative battery cable.