Pinpoint Test D: The Puddle Lamp(S) Are Inoperative

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. 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.

D1 CHECK THE PUDDLE LAMP OPERATION
- Ignition OFF.
- Operate the instrument panel dimmer switch to the DOME LAMP position.
- Are both the puddle lamps inoperative?
- Yes : VERIFY the SJB fuse 10 (15A) is OK. If OK, GO to D2. If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article, to identify the possible causes of the circuit short.
  After the repair: if no DTCs are present, TEST the system for normal operation.
  
  If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the puddle lamp output driver if DTC B106E is present) . TEST the system for normal operation.
  
  If DTC B106F is present, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
- No : GO to D3.
D2 BYPASS THE SJB
- Operate the instrument panel dimmer switch out of the DOME LAMP position.
- Disconnect: SJB C2280c.
- Connect a fused jumper wire between the SJB C2280c-12, circuit CLN25 (VT), harness side and battery positive.
- Do the puddle lamps illuminate?
- Yes : REMOVE the jumper wire. GO to D3.
- No : REMOVE the jumper wire. REPAIR circuit CLN25 (VT) for an open. CLEAR the DTCs. REPEAT the self-test.
D3 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR
- Operate the instrument panel dimmer switch out of the DOME LAMP position.
- Disconnect: Suspect Exterior Mirror.
- Operate the instrument panel dimmer switch to the DOME LAMP position.
- For Fusion/Milan, measure the voltage between the LH exterior mirror C517-4, circuit CLN25 (VT), harness side and ground; or between the RH exterior mirror C625-4, circuit CLN25 (VT), harness side and ground.
  
  Fig 2: Measuring Voltage Between LH Exterior Mirror C517-4, Circuit CLN25 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- For MKZ, measure the voltage between the LH exterior mirror C522-5, circuit CLN25 (VT), harness side and ground; or between the RH exterior mirror C626-5, circuit CLN25 (VT), harness side and ground.
  
  Fig 3: Measuring Voltage Between LH Exterior Mirror C522-5, Circuit CLN25 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to D4.
- No : REPAIR circuit CLN25 (VT) for an open. TEST the system for normal operation.
D4 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR USING THE CONNECTOR GROUND
- For Fusion/Milan, measure the voltage between the LH exterior mirror C517-4, circuit CLN25 (VT), harness side and the LH exterior mirror C517-6, circuit GD126 (BK/WH), harness side; or between the RH exterior mirror C625-4, circuit CLN25 (VT), harness side and the RH exterior mirror C625-6, circuit GD139 (BK/YE), harness side.
  
  Fig 4: Measuring Voltage Between LH Exterior Mirror C517-4 And LH Exterior Mirror C517-6
  Courtesy of FORD MOTOR CO.
- For MKZ, measure the voltage between the LH exterior mirror C522-5, circuit CLN25 (VT), harness side and LH exterior mirror C522-7, circuit GD126 (BK/WH), harness side; or between the RH exterior mirror C626-5, circuit CLN25 (VT), harness side and the RH exterior mirror C626-7, circuit GD139 (BK/YE), harness side.
  
  Fig 5: Measuring Voltage Between LH Exterior Mirror C522-5, Circuit CLN25 (VT) And LH Exterior Mirror C522-7, Circuit GD126 (BK/WH)
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new exterior mirror in question. REFER to REAR VIEW MIRRORS -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
- No : REPAIR the ground circuit in question for an open. TEST the system for normal operation.