Pinpoint Test D: One Or More Module-Controlled Illumination Source(S) Is Inoperative

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. 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.

D1 CHECK FOR RECORDED SJB DTCs
- Check the recorded results from the SJB continuous and on-demand self-tests.
- Are any DTCs recorded?
Yes: For DTC B2026, GO to D4.

For DTC B2027, GO to D5.

For all others, GO to the SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) INDEX table.

No: GO to D2.

D2 CHECK THE VOLTAGE TO THE SINGLE ILLUMINATION SOURCE

Key in OFF position.
Disconnect: Inoperative Illumination Source.
Place the headlamp switch to the parking lamps ON position.
Rotate the instrument panel dimmer switch to the full illumination position.

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

INOPERATIVE ILLUMINATION SOURCE VOLTAGE SPECIFICATION

Suspect Component	Connector - Pin	Circuit
Adjustable Pedals Switch	C2089-2	1417 (LG/RD)
Decklid Release Switch	C2269-2 (vehicles built through 12/2005) C2269-5 (vehicles built after 12/2005)	1417 (LG/RD)
Center Stack	C2114-7	1417 (LG/RD)
Manual Climate Control Assembly	C294a-2	1417 (LG/RD)
Analog Clock	C2016-2	1417 (LG/RD)
Shifter Assembly	C3245-2	1418 (LB/WH)
Headlamp Switch	C205-2	1418 (LB/WH)

Is the voltage greater than 10 volts?

Yes: GO to D3.

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

D3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN

Key in OFF position.

Measure the resistance between the inoperative illumination source, harness side and ground as follows:

INOPERATIVE ILLUMINATION SOURCE RESISTANCE SPECIFICATION

Suspect Component	Connector - Pin	Circuit
Adjustable Pedals Switch	C2089-1	1205 (BK)
Decklid Release Switch	C2269-1 (vehicles built through 12/2005) C2269-4 (vehicles built after 12/2005)	1205 (BK)
Center Stack	C2114-4	1205 (BK)
Manual Climate Control Assembly	C294b-1	1205 (BK)
Shifter Assembly	C3245-4	1205 (BK)
Headlamp Switch	C205-1	1205 (BK)
Analog Clock	C2016-3	1205 (BK)

Is the resistance less than 5 ohms?

Yes: INSTALL a new component in question. TEST the system for normal operation.

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

D4 CHECK CIRCUIT 1418 (LB/WH) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: Headlamp Switch C205.
- Disconnect: Shifter Assembly C3245.
- Disconnect: SJB C2280d.
- Measure the resistance between the SJB C2280d-20, circuit 1418 (LB/WH), harness side and ground.
  
  Fig 1: Measuring Resistance Between SJB C2280d-20, Circuit 1418 (LB/WH), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes: GO to D6.

No: REPAIR the circuit. TEST the system for normal operation.
D5 CHECK CIRCUIT 1417 (LG/RD) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: Adjustable Pedal Switch C2089.
- Disconnect: Decklid Release Switch C2269.
- Disconnect: Center Stack Switches C2114.
- Disconnect: Manual Climate Control Assembly C294a.
- Disconnect: Analog Clock C2016.
- Measure the resistance between the SJB C2280d-4, circuit 1417 (LG/RD), harness side and ground.
  
  Fig 2: Measuring Resistance Between SJB C2280d-4, Circuit 1417 (LG/RD), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes: GO to D6.

No: REPAIR the circuit. TEST the system for normal operation.
D6 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 REMOVAL AND INSTALLATION . 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.