Pinpoint Test B: DTC B1360 The Ignition Run/Acc Circuit Open

WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK THE INSTRUMENT CLUSTER CIRCUIT 489 (BK/PK) FOR VOLTAGE
- Disconnect: Instrument Cluster C220b.
- Key in ACCESSORY position.
- Measure the voltage between the instrument cluster C220b-17, circuit 489 (PK/BK), harness side and ground.
  
  Fig 1: Measuring Voltage Between Instrument Cluster C220B-17, Circuit 489 (PK/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B2.
- No : GO to B4.
B2 CHECK CIRCUITS 640 (RD/YE) AND 1003 (GY/YE) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Instrument Cluster C220a.
- Key in ON position.
- Measure the voltage between the instrument cluster C220a-5, circuit 1003 (GY/YE), harness side and ground; and between the instrument cluster C220b-16, circuit 640 (RD/YE), harness side and ground.
  
  Fig 2: Checking Circuits 640 (RD/YE) And 1003 (GY/YE) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B3.
- No : GO to B4.
B3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all the instrument cluster connectors.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect all the instrument cluster 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 instrument cluster. REFER to INSTRUMENT CLUSTER . CLEAR the DTCs. REPEAT the self test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CLEAR the DTCs. REPEAT the self test.

B4 CHECK THE POWER CIRCUITS BETWEEN THE INSTRUMENT CLUSTER AND THE IGNITION SWITCH FOR AN OPEN

Key in OFF position.
Disconnect: Ignition Switch C250.

Using the following table measure the resistance between the instrument cluster, harness side and the ignition switch, harness side.

Instrument Cluster	Ignition Switch
C220a-5, circuit 1003 (GY/YE)	C250-1, circuit 964 (DB/LG)
C220b-16, circuit 640 (RD/YE)	C250-1, circuit 964 (DB/LG)
C220b-17, circuit 489 (PK/BK)	C250-6, circuit 297 (BK/LG)

Fig 3: Checking Power Circuits Between Instrument Cluster And Ignition Switch For An Open

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : INSTALL a new ignition switch. REFER to IGNITION SWITCH . CLEAR the DTCs. REPEAT the self test.
No : GO to B5.

B5 CHECK THE POWER CIRCUITS BETWEEN THE INSTRUMENT CLUSTER AND THE CJB FOR AN OPEN

Disconnect: CJB C270e.
Disconnect: CJB C270f.

Using the following table measure the resistance between the instrument cluster, harness side and the CJB, harness side.

Instrument Cluster	CJB
C220a-5, circuit 1003 (GY/YE)	C270e-14, circuit 1003 (GY/YE)
C220b-16, circuit 640 (RD/YE)	C270e-17, circuit 640 (RD/YE)
C220b-17, circuit 489 (PK/BK)	C270f-2, circuit 489 (PK/BK)

Fig 4: Checking Power Circuits Between Instrument Cluster And CJB For An Open

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to B6.
No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self test.

B6 CHECK POWER CIRCUITS 297 (BK/LG) AND 964 (DB/LG) FOR AN OPEN
- Disconnect: CJB C270h.
- Measure the resistance between the CJB C270h-12, circuit 297 (BK/LG), harness side and the ignition switch C250-6, circuit 297 (BK/LG), harness side; and between the CJB C270g-3, circuit 964 (DB/LG), harness side and the ignition switch C250-1, 964 (DB/LG), harness side.
  
  Fig 5: Checking Power Circuits 297 (BK/LG) And 964 (DB/LG) For An Open
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : INSTALL a new CJB. CLEAR the DTCs. REPEAT the self test.
- No : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self test.