Pinpoint Test F: A Single Illumination Source Is Inoperative - NONDIMMABLE Illumination Source

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

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

F1 CHECK CIRCUIT CBP02 (GN) FOR VOLTAGE

Disconnect: Inoperable Illumination Source.
Key in ON position.

Measure the voltage between the inoperable illumination source harness side and ground as follows:

CONNECTOR - PIN CIRCUIT

Illumination Source	Connector - Pin	Circuit
LH door lock control switch (Fusion/Milan)	C505-2	CBP02 (GN)
RH door lock control switch (Fusion/Milan)	C605-2	CBP02 (GN)
Ashtray	C370-2	CBP02 (GN)
Roof Opening Panel Switch	C912-1	CBP02 (GN)

Is the voltage greater than 10 volts?

Yes : For door lock control switch(es), INSTALL a new door lock control switch. REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .

For : the ashtray, GO to F3.

For : the roof opening panel, GO to F4.

No : GO to F2.

F2 CHECK CIRCUIT CBP02 (GN) FOR AN OPEN

Key in OFF position.
Disconnect: SJB C2280e.

Measure the resistance between the SJB C2280e-25, circuit CBP02 (GN) harness side; and the inoperable illumination source as follows:

CONNECTOR - PIN CIRCUIT

Illumination Source	Connector - Pin	Circuit
LH door lock control switch (Fusion/Milan)	C505-2	CBP02 (GN)
RH door lock control switch (Fusion/Milan)	C605-2	CBP02 (GN)
Ashtray	C370-2	CBP02 (GN)
Roof Opening Panel Switch	C912-1	CBP02 (GN)

Is the resistance less than 5 ohms?

Yes : GO to F7.

No : REPAIR the circuit. TEST the system for normal operation.

F3 CHECK CIRCUIT GD115 (BK/GY) FOR AN OPEN
- Measure the resistance between the ashtray C370-3, circuit GD115 (BK/GY), harness side and ground.
  
  Fig 1: Checking Circuit GD115 (BK/GY) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the ashtray and ground?
Yes : INSTALL a new illumination source. TEST the system for normal operation.

No : REPAIR the circuit. TEST the system for normal operation.
F4 CHECK CIRCUIT CPR39 (VT/WH) FOR AN OPEN
- Disconnect: Roof Opening Panel Module C921.
- Measure the resistance between the roof opening panel switch C912-4, circuit CPR39 (VT/WH), harness side and the roof opening panel module C921-11, circuit CPR39 (VT/WH), harness side.
  
  Fig 2: Checking Circuit CPR39 (VT/WH) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to F5.

No : REPAIR the circuit. TEST the system for normal operation.
F5 CHECK CIRCUIT GD139 (BK/YE) FOR AN OPEN
- Measure the resistance between the roof opening panel module C921-4, circuit GD139 (BK/YE), harness side and ground.
  
  Fig 3: Checking Circuit GD139 (BK/YE) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to F6.

No : REPAIR the circuit. TEST the system for normal operation.
F6 CHECK FOR CORRECT ROOF OPENING PANEL MODULE OPERATION
- Disconnect the roof opening panel module connector.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect the roof opening panel module 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 roof opening panel module. REFER to ROOF OPENING PANEL . 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.
F7 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - Corrosion
  - 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 CONTROL MODULES . 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.