Pinpoint Test E: The Puddle/Scuff Plate Lamp(S) Are Inoperative

WARNING: This page is about a different car, the 2011 Lincoln MKT. 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.

NOTE: Make sure the bulb(s) are OK before continuing diagnostics.

E1 CHECK THE PUDDLE LAMP OPERATION
- Press the instrument panel dimmer switch to the second detent up to turn the courtesy lamps on.
- Are both puddle lamps inoperative?
- Yes : GO to E2.
- No : GO to E3.
E2 BYPASS THE SJB
- Ignition OFF.
- Disconnect: SJB C2280c.
- 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 courtesy 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 article. Test the system for normal operation.
  
  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 E5.
- No : REMOVE the jumper wire. REPAIR circuit CLN25 (VT) for an open. TEST the system for normal operation.
E3 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR
- Press the instrument panel dimmer switch to the second detent down to turn the courtesy lamps off.
- Disconnect: Suspect Exterior Mirror.
- Press the instrument panel dimmer switch to the second detent up to turn the courtesy lamps on.
- Measure the voltage between the LH exterior mirror connector C516-5, circuit CLN25 (VT), harness side and ground; or between the RH exterior mirror connector C625-5, circuit CLN25 (VT), harness side and ground.
  
  Fig 2: Measuring Voltage Between LH Exterior Mirror Connector C516-5, Circuit CLN25 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to E4.
- No : REPAIR circuit CLN25 (VT) for an open. TEST the system for normal operation.

E4 CHECK FOR VOLTAGE TO THE EXTERIOR MIRROR USING THE CONNECTOR GROUND

Measure the voltage between the suspect exterior mirror connector, harness side as follows:

Location	Connector-Pin/Circuit	Connector-Pin/Circuit
LH exterior mirror	C516-5 CLN25 (VT)	C516-7 GD133 (BK)
RH exterior mirror	C625-5 CLN25 (VT)	C625-7 GD145 (BK/BU)

Fig 3: Measuring Voltage Between Suspect Exterior Mirror Connector, Harness Side

Courtesy of FORD MOTOR CO.

Is the voltage greater than 10 volts?

Yes : REPAIR or INSTALL a new exterior mirror in question. REFER to REAR VIEW MIRROR article. TEST the system for normal operation.
No : For the LH exterior mirror, REPAIR circuit GD133 (BK) for an open. TEST the system for normal operation.
For the RH exterior mirror, REPAIR circuit GD145 (BK/BU) for an open. TEST the system for normal operation.

E5 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.